GoSolar is the pits!

I have just purchased a property and the previous owners were renting out Solar from these guys. I then requested for the removal of the solar system because I did not see the need for it, paid GoSolar R22 000 as instructed to remove the panels. Now problem is my roof is leaking where they had removed the panels, I emailed them and they sent the same guy who removed the panels. The guy went up the roof and went on and on on how they were not responsible for the leaks, he took a red paint and painted some of the parts and took pictures to send to GoSolar. A day later, there was rain and the roof still leaks! What’s making me angry is that when the panels were still on the roof, there was no leaking, however when the panels were removed, there was leaking, so how can they even deny not being responsible. Moreover, I paid 22k for them to remove the panels, that’s a ridiculously high amount which I would expect to fix all the damage done during removal.