T mobile Promotion said trade in old phones and get new iPhone 11, sent 4 phones to them with their mailing label for trade in. Value of $2,200. Tmobile lost them. Now charging full price for new phones with no credit. Unwilling to resolve.

I called in April and told if I paid off my cell phones with previous carrier they would give me credit for 4 new iPhone 11. I paid over $500 to payoff old phones and mailed to them with their label . They lost them and now refuse to give me credit. Promised $150 a month bill, now $250 because I have 4 new iPhones with no credit as promised.

Called 1 a week since May, promised $2,200 in Visa card to be mailed to me, never received. Spoke to 6 supervisors and customer resolution with no resolution. Never call back. I am small business impacted by covid. I really on cell phone for my business and home number. I can't afford this new amount they are charging me. Please help