How stupid do you think I am?

After I had my Samsung tablet for about 3 months I get a quote for a screen repair because of a small cracking in the left hand corner. More than R 2000 so I said no seeing as it didn't influence my usage at all. Now 3 months before the end I send it in for repair because it loses battery life for no reason and keeps on rebooting all the time. Should be a mere software issue according to me but no. They rejected the repair because they feel that there is clear signs of physical damage? I am so disappointed and used to work in the cellphone industry. It's utterly ridiculous and and doesn't even make sense. I'm disgusted by the service received from Vodacom and is in the process of cancelling all 4 contracts I have with them.