Refund

I have been with Directtv for some time.  We sold our home and put directtv on pause while we stayed in apartment for 3 months.  We we moved into our new home I was setting up appointments to get service restarted.  The gentleman who answered my call said no we will just start new account, that would be better.  Well this left a credit of $176.46.  In October got a statement and said refund of that amount issued.  Really?? Where is it.  I have talked to so many people in customer service all the way to being told to call the company who issues the gift card with the credit on it. Again, no help.   Who do I reach out to to get the refund that is due?  This has been going on way to long.