Bad service and faulty base bed

I am Owen, I bought a medi spine bed on the 23-05-2020 at Lewis Store Bronkhortspruit branch. I noticed that the base was faulty and I immediately reported to the store manager within a month. I have went to the store on several occasions as the bed is still on warranty to date nothing has been done about my complain. The manager keeps telling me it will be sorted but it's going to a year, no hope. I have never seen such a bad service and poor managerial skill like the one portrayed by the Bronkhortspruit manager. I wish I can get help.