KUPAKP-60 Handpiece ONLY (for MANIPro Passport)

Want to return but can't

We bought three of these KP-60 handpieces and control boxes, one of them started to have issues within months into the one year since purchase. The handpiece started to overheat, previously immobile parts started to spin on it, the control box started to fluctuate the speed without being touched, among other issues. Their warranty process and customer service is atrocious, so atrocious that you should just assume you don't have a warranty.1. You have to go to their website, add the repairs to a cart (yes they're actually items you have to add to a cart), pay the price for it ahead of time ($120), then you ship the items to them on your own. They say they refund you the cost if it's covered by warranty.2. I waited three weeks, received the handpiece and control box back with no explanation as to whether it was covered by warranty and no refund, so I assume the answer as to whether it was covered by warranty is "no".3. Upon inspecting it, the handpiece now has a different issue where the ring under the collet release is loose, so they didn't even repair it correctly! After hours of discussion that went nowhere, they finally told me to send it back but that they may charge a second repair fee. Despite the invoice clearly showing they disassembled the handpiece and were the last ones to touch it, they can't guarantee they won't charge a second repair fee, which is the most asinine thing I've ever heard. To make this absurd situation even funnier, I looked up videos on how to disassemble the handpiece to see what their "repair technician" would have done, the video shows the ring has to be loosened in order to take it apart, so it's clear they did this to our handpiece and didn't tighten it, yet they won't fix their own mistake. The repair "item" on their "store" explicitly mentions that this is a "complete" repair and you pay "one flat rate", yet they now want to charge a second fee for what exactly?Basically their business model assumes it's far more likely their customers are scammers, than one of their repair technicians might have made a simple mistake. They'd have to have the brain activity of a goldfish to think this, given I paid ahead of time, they have my information, I waited THREE WEEKS to pull off this heist of the century (there's quicker ways to make money) and the only thing I wanted from them was to take the handpiece back and repair it properly.Buy another handpiece, there's too many competitors out there for them to feel entitled to bully customers. Kupa is rotten to the core, as someone who's bought their handpieces for over two decades I've watched the quality of their customer service and the items themselves deteriorate, now they're just riding the coattails of their past reputation. If you do buy it and run into issues, do not send anything in for repair, after I experienced this debacle I searched YouTube and the internet and found videos and instructions on disassembling the handpiece and control box as well as websites that sell the parts, it's much cheaper to do it yourself and less infuriating. Taking apart the handpieces and control boxes isn't rocket science (even though they charge like it is), sure you're voiding the warranty but the warranty is worthless LOL. For the handpieces and control boxes we already have, this is now going to be what we do to avoid dealing with them.You've been warned. Don't bother calling them either, you're sent to an automated service that tells you to leave a message, e-mailing them yields no response as well. Live chat takes HOURS for their one rude customer service representative to respond to simple questions.