Unhappy customer

I bought the bed last year (12 December 2020) it good then ,and mid January 2021 it was very bad,went to report to them because in the contract it says I have 6 months guarantee, they log the complain I waited till end of January, I went back to shop to findout what the problem, they told me they don’t have transport to come and fetch the bed, they promise to within the week I waited till 07 April 2021 then they came trying to blame me now why did I remove the plastic that was on the the bed,the warehouse might not accept it without the plastic,the took it same they bring it back with stain marks of which I don’t know any thing about, the trying to blame it on me, I ask the if their was stain why did they took it? No answer but refusing the change it as per the contact. And now it blaming games the manager blames the guys who came and fetch the bed and the say warehouse is refusing to take.to is found hard to deal with them because all what they are doing is buying time for them self,my first report was January only attended April that is poor customer service. And the attitude is very bad now, we are fighting now