Car problem with Reeds Bellville Service Centre

As a valid costumer of Reeds i have a opel corsa 1.4 cause me a lot of problem . In November 2019 take the car in for repair thy need to replace parts' after replace parts.only last to Feb'202 to the car back thy tel me to replace my tradiator, waterpump, termostat and Tappet Cover that coast me R19810.43 anf gas what my car give the same problem take the car back to them and thy tell me thy need to replace another part please help i am so tired of William Hunt