No delivery, no communication, and BAD service

I ordered and paid for bunk beds on the 4th of June, I received an email that my goods are out on delivery on the 14th of June, when I followed up with the courier the 15th I was advised that the goods were damaged and they sent it back. I did not received any calls or emails from Groupon to advise. I have reported the matter more than once, with no feedback and eventually last week, more than a month later they decided to refund me. I was asked to email my banking details and did so the same day (7Th) and nothing, I had to call AGAIN the 10th to follow up and AGAIN this morning. ONLY to be advised I should have sent proof of payment. No one told me to send proof of payment, and now I have to wait another 7-10 working days for a refund. It's been over a month and I want an immediate refund TODAY!