T-mobile over 100 days has not returned my money

I called to have  new services. I paid for activation fee. We changed our mind. we never active any service or account with them. We never used any thing or services. We called and cancel our request. We called them and asked for returning our money. They always say they will do in next day, in two days, in one week, in 10 days in two weeks. It is over 100days. I talked to many their employees. They probably put over 200 hours to help me and I am still in and talking with them. They got my bank routing and account number to refund me.