Poor service and empty promises

Hi I have bought kitchen units from beares Silverton in March since day one I had problems with the units I keep on reporting it to the store they keep on telling me that assembler will come and have a look which I still feel that cupboards is non fixable what if that unit breaks who will be responsible for that damage I am very unhappy for that poor service and another thing why do you pay insurance on items if it can’t be replace or fix within time and I did send pictures to the store manager and show her the cracks in that cupboards I don’t assembler to come and have a look they must send new units with assembler to fit it immediately if the hood is broken how will u buy things to fixed it please sort out this issue urgently