Disappointing service

My hubby and I had been searching a few months for a sleigh bed in the size Queen Standard and was relieved when we found it at Rochester Cornubia Mall, when the sales assistant confirmed it was a Queen Standard size. We made full payment on the day and even complimented her for the excellent service. Little did we know.... A week later we made ourselves available to take delivery and after 1.5hours of the delivery men assembling the sleigh bed in horror we noticed it was not Queen Standard but instead Queen XL. We contacted the store and we were told to return the bed. We filled in refund forms and submitted. Only to be informed a few days later my ID copy was also required even though i paid via my debit card in full. I was very sceptical but really needed by money back so I comp****. I didn't receive any feedback and when I called the store to enquire the status they informed me they would check with head office and get back to me. After a few hours they contacted me and told me that now they require either an affidavite from the police station authorising my husband to allow Rochester to refund into my banking account as my husband's details was used to open the account on their system although I used my debit card to make payment OR they needed my husband's confirmation of banking details and copy of ID to make the redfubd to him. Doesn't make sense as I paid for the item. We chose the simpler of the two and opted for an affidavite. Yet again we were inconvenienced although it was the stores error and we had to waste our time to drive to the police station to get this affidavite. We sent it off on email and asked for urgent acknowledgement and feedback and we got no response. I had to yet again use my own airtime to contact the branch to get feedback although I requested that someone contact me on my email I sent. Head office has also not contacted me as I requested. I am highly dissatisfied with the poor service we are receiving just so that I can get my own money back. Clearly nobody knows what to do and need to go on proper training to teach them good customer service, as i was also spoken to very rudely by the manager. I would also like to know if we will be compensated for interest on my money they have in their bank account for this long. This is highly ridiculous and frustrating.