DAMAGED BED

I bought a bed and base at Montana on the 30/01/2021 and I paid cash for it. They delivered the bed the next day By delivery the bed was w****d in cling wrap. But the bed and base was damaged The delivery people said that I must keep the bed . They will return it for me. The delivery people took photos an whattsapp it to the shop So I was waiting and I made a lot of calls to them but all they say. They are waiting for head office. They never phone me back as I was told they would do. Then about 4 weeks ago I ask that my money must be paid back to me They told me that they must fill in papers at Montana and send it to Head office and it will take 7 Working days then my money will be paid back to me and they eill come and get the bed. No word from them. Im still waiting All I want is my money back so that I can buy a bed that is not damaged. What else must I do