T-mobile lied to me TWICE. T-Mobile, when will you make good on your promise?

Before I start, please do yourself a favor and switch to one of the legitimately GOOD providers like Verizon or AT&T.  You will save money in the long run and get better quality service.  Read below to understand why.

I started a T-Mobile account in Nov 2018.  Before this, I checked their coverage map to confirm coverage in my primary area of use.  Lie #1: T-mobile's coverage map claims that here was coverage my area even though there was not.  For over 3 months, I suffered from lack of coverage and missed many important calls that went straight to voicemail, and only received notification of these voicemails at the end of the day.

I called T-Mobile support MANY times to try to hopefully resolve this.  None of there solutions worked.  Finally, at the end of February, I called again and spoke with a T-Mobile tech support agent.  This agent ran some diagnostics on his end and confirmed that there was no T-Mobile coverage in the area I lived in, even though the coverage map said there was.  THIS AGENT THEN SUGGESTED THAT I SWITCH TO ANOTHER PROVIDER.  However, I had already refilled my account with money prior to this conversation.  Lie #2: THE AGENT PROMISED THAT T-MOBILE WOULD REFUND THE MONEY TO ME.  Given this suggestion and promise of a refund, I immediately made the switch to a better provider with greater coverage.

It has been over 2 months and T-Mobile refuses to give me money back and has been giving me the runaround each time I call.  I have wasted MANY hours pleading with customer service agents (most of or all of whom are outside the US).

My questions to T-Mobile:  Are you satisfied with giving false information about your coverage?  Are you satisfied with breaking on your promise to give me a refund or will you finally make good on your promise?