Waiting on refund!!

Hello I have been waiting on my refund for 23 days now. I cancelled my service on the 13th of last month (December) and returned my equipment on December 22nd. I have been told multiple different times and dates and promised multiple times that I would receive my refund, the most recent promise was me supposedly getting it today the 5th of January, and still nothing. I keep getting told different things and I don’t know who to believe or when to expect it. It’s been very very frustrating and I’ve been waiting well long enough. Can someone please guide me to the right helpline or if anyone can please inform me of when I should see my refund. Thank you!