Cash App complaint: Refuses to cancel or return hundreds of $

Cashapp is refusing to return hundreds of dollars that was sent to my account that they closed out months ago. The sender has tried requesting a refund, disputing charges, has been in constant contact with cashapp for the last 36 hours and every single rep states that they cant help and tells her to tell the person receiving to contact them. I then contact them and they tell me that the $ was sent to correct account and $tag name when in fact it was not. Then another rep will say that its sitting in there just waiting for me to get it and deposit it on another card and so on. I write back and get automated responses and no one responds. There is probably 100 emails back and forth between the sender and I with cashapp and still nothing getting done. The last message sender received was they can no longer assist her in this matter. I need my $ back