Very poor customer service and not good to buy car from

Hi I both a car at ACS Pre Owned last year , they had it service from they mechanic, in January 2022 I went back them the petrol tank was leaking I took the car to Borch Boksburg the charge me +-R1500 I went back to ACS as they promise to help to they never kept they promise, I took the car back to them Sharon state she will assist in getting me another petrol tank she never did, 27 July 2022 I took the car for a service at BMW Boksburg they found the diff is faulty, all 4 wheels are not straight the gearbox is whining knocking noise on the suspension both front shocks are leaking, both control arms are are cracked,