The worst customer service

Hello dear community, I was patient for a long time but I don't have any more patience or understanding!!! I consider T-Mobile as the worst service, which is created to terror people!!!

I have been with T-Mobile for many years, and everything seemed ok until I decided to buy 2 iPhones this year! I called them and asked if they have any specials, the expert said yes and explained that all we have to do is to pay down payment for 2 phones in the amount of $421!!! And the rest will be deducted through monthly payments! And we agreed! After we were waiting for the phones and something crazy started happening to our account!!! We have been charged 3 times the amount of $421!!! And we patiently called T-Mobile and the expert apologized and promised to credit wrong charged amounts. We waited for a week and nothing happened we called again (I am not talking that every time you call you have to wait for a long time and explain everything from the beginning to every "expert"!), and another expert told us that we were explained wrong and we were supposed to be charged 2 times in the amount of $421!!! Immediately we said that in this case we don't want the phones and we sent them back! T-Mobile received them and sent an email confirmation, but didn't return our money and plus started charging us for the devices through monthly payments through autopay!!!??? We called again and again, and we had to explain million times what happened, every expert was giving different info, saying it will take 5-7 business days to refund or it will take 1 month, every time we called it was different information?!?! After million time calling and explaining we decided to talk to the experts only through chat! We wrote and explained everything again and they said to us that T-Mobile doesn't have our phone!!!??? That they can't find it?!?! We were devastating, how possible?! After confirming so many times over the phone and through email and now they lost the phones and they want to charge us, unbelievable?!?! I sent them confirmation receipt from UPS, and they said that they will investigate 😅😅😅😭😭😭😭😭! And that it will take up to 7 days!!! After we disputed the charges through our bank, because it was obvious that T-Mobile isn't able to do anything! And we won! And T-Mobile decided to charge us those $421 and plus monthly charges through our bill!!! 😭😭😭 when we saw the balance we were already going crazy, and they applied insufficient funds and late fees, even though we were never late in our payments and we always paid our bills!!! Three months went by to try to explain to these "wonderful experts" that we don't have phones! And that we were overcharged for something what we don't have! And only today the bill was adjusted?! And we are even afraid to pronounce it, because it might change again online tomorrow and we might see crazy balance online! Besides the fact the network doesn't work in all the parts of the city!!! I will highly NOT RECOMMEND TO ANYONE TO HAVE T-MOBILE!!! And if you are already a customer please DO NOT BUY ANY DEVICES FROM THEM, APPLE HAS BETTER DEALS AND NOBODY WILL TRICK YOU THERE!!!