Samsung — Unhappy with Samsung Products

I upgraded to a Samsung S6 but am regretting ever doing it. My experience with a Samsung product is BAD BAD BAD . We bought my daughter a Samsung Galaxy Tab 3 for school purposes BUT it has been in for repairs 3 times already in 1 year. 2 years ago I upgraded to a Samsung S4 but I did not have it for 7 days and it started giving me problems. I have had to take it back to Vodacom 2 times already as the cellphone becomes hot. It is in the repairs at this very moment as it just switches off. When upgrading I did not want to upgrade to a Samsung cellphone again but my husband and son kept saying that I should BUT honestly I regret doing it as just as with the S4 the S6 has gone back to Vodacom before having it for 7 days. What upsets me the most is that I am without a phone at this very moment. I asked Vodacom whether I could rather upgrade to a S6 Edge but was told that I would then have to pay an about of over R2600 which I don't have.