Bad product

I bought my son a Lenovo A1000 tablet for his birthday last year in May. In August the tablet wouldn't charge and we got referred to partserv as the warranty states they can look at it. They came back saying the main board is damaged and they would replace it. In December the same problem occurred, but we didn't have time to take the tablet back to partserv and ended up buying my son an iPad. My son wanted to get something of his Lenovo so we decided to take it back to partserv. Turns out it is the main board AGAIN and they quoted us R3000 for repairs!! When I pointed out that I bought the tablet for only R1499, they reduced the repairs amount to R2500. Needless to say I refuse to pay that. It's shocking to see your product not lasting even 3 months without breaking. I am not getting any help, so will now be posting it on all social media.