Bad service

On the 29th of November 2019 I took my car hyundai tucson for service at car service city in carnival mall,I gave them the car wothout any engine leaks and when I received the car it was full of oil inside the engine, I called the manager Jeandre and informed him, he then said i must bring the car back which I did, they washed the engine then whe I fetched it, there was a trange sound from the engine and i valked him again, he came to my workplace to fix it, it was fine for few days then I noticed that the under cover was fastened by cable ties and the bull bar and the front bumper were lose, I took it back again to be fixed, even though the manager was all smiles you could see that he's not happy with me, He also insisted I replace the brake pads with skimming of discs as well, but they were making noise and I also informed him of that, in February i took it in for the break pads cause he said he's fixing the edges, but the problem persist and the engine leaks were visible again, I made several calls to inform him but the receptionist kept telling me that he's busy and he'll call me back, till this day he never did and im sitting with the problem, Im so dissapointed as my car is not as powerful as it used to be since that november.