METRO PCS deceived into buying a phone I can't hear out of refused to refund money switched to another company. Holiday Florida

On December 8th 2016 I went into a Metro pcs Talk Time phone purchase location at 3339 US 19                       I paid $51.63 for a phone that had poor audio 10 days later they called it defective and replaced it with aother phone that had poor audio. Was promised a call back when UPS brought it to 3338 US 19 talk time location the phone audio was too low. Around  December 30th found out it was at the store a week.
They refused to replace phone with a better quality phone unless I bought another phone so I would lose the $51.63 so I wanted a refund. Was threatened and bullied by Matthew the salesman.

Called Metro Pcs customer service agent Rhea id #500117 at 888-576-3876 she said to mail phone to Metro pcs P.O. Box 5119 Carol Stream, Illinois 60197 for a refund as directed by customer service I paid over $7.00 to mail it. According to tracking number 950951416267703107527 they received it Feb. 2, 2017

Was told go back to the Talk Time phone store location salesman Matthew said mail it to the P. O. Box also so I did. Called February 6th for my money back, was told that it was a mistake they don't give refunds.

I specifically asked for a loud phone before I bought it. Matthew said this is an upgrade phone to the one I have.

Had issues with refusing to refund from new agent John id 25544 he provided me two numbers for Metro pcs corporate. Numbers given  941-330-0880 was Amscot and 727-343-4979 was a non working number on February 9, 2017

Was promised a whole refund of $51.63 by manager Joseph ID #17218 on February 6, 2017 at number 214-265-2550 if I wait 4 to 7 weeks he said.

This company METRO PCS is very a deceptive and fraudulently operated company and they lie to you to sell you phones that are not good and refuse to give you your money back and waste hours of your time hoping you will give up. Their terms and conditions should be void because of their fraudulent and deceptive practices.

They have even refused refunds to customers that returned items back very soon after purchase.

I have had Metro Pcs as my provider for 10 years and never missed a month to month payment

I have been on the phone and at the store for over 12 hours trying to get my money back.

I would like to file a lawsuit against them.