Cancelled/Undelivered order charged to my account

I have the very same complaint as the client of 23 February 2021. I cancelled a mattress and base set order as Homechoice was unable to deliver in time for my son's wedding on 25th October 2020, but now I being told it was delivered on the 5th of November 2020 and I must pay for an order I did not receive. I don't see why they charged this to my account and they refuse to credit me as customer services advised that if I refuse to complete the dispute forms, it means I did receive it, so I was indirectly forced to complete it. They were harassing me for payment for something I did not receive, They also took almost 4 months to collect a return, really utterly pathetic service!!!!!