Took my truck in to get fixed on issues it was hav...

Took my truck in to get fixed on issues it was having, few hours later they called me they found the problem and GUARANTEED me that was the problem. I paid $720 but it was fixed! 5 days later the exact same thing happened again i took it back and now they said it was something else that had nothing to do with what they fixed the first time and still charged me 80$ for the visit. After I was guaranteed on what the issue was, paid 720, still got charged on them checking what it was the second time and my truck still not working. Very dissatisfied, i feel robed. 720$ of my money gone and my vehicle still doesn't work. Terrible service.