Casseys Auto Ford Benoni BAD service

I drive a 2014 Ford Fiesta 1.6 diesel. My parents live in Benoni and i live in Bloemfontein. I went to visit them in Benoni and my car was due for it's 150 000km service. I then took it to Casseys Auto Ford Benoni. They called me and said they did everything i asked them and said the total is about R12 300. They said my brakes in the front and back are worn. I gave them the go ahead and they did the service and replaced all the brakes. About a week after the big 150 000km service the check engine light came on and my computer told my a service was due! My car then started losing power and it seemd like they messed something up!I called Casseys auto ford Benoni and told them the situation and they said i should bring the car back to them. I told them i live in Bloemfontein and would not be able to go to Benoni in the next two months, can i not just take it to Human Auto ford in Bloemfontein? They said no i can't i have to bring it to them. This is when i could not understand how they operate! Two months later i went back to Benoni to visit my parents in Benoni and took my car back to Casseys auto ford. They charged my another R1099 and said my air filter got water damage and disintegrated. I gave them the go ahead not knowing they never replaced my airfilter on the 150 000km service. When i went to pick up my car they gave me the old air filter and i saw the filter was really old and dirty with damage to it. This is when i knew the air filter was really old and they never did their work properly on the 150 000km service. They never rest the computer for the service due message and never replaced an old air filter that obviously needed to be replaced. I really got bad service and was really disappointed and would never take my car back to Casseys Auto Ford Benoni!