hisense tv

terrible customer service from hisense. i bought a 4k 50" tv in 2017 from hisense, within a week i had to take it back because the power board was faulty, recently my tv did not show picture only sound. took it to hisense in bedfordview, they told me they could fix it for R1700, I had no problem paying to fix due to warranty being expired. they then phoned me and told me they could not fix my tv but they will credit me or replace it with new one, great news for me, the next day i head in to hisense just for them to tell to tell they cannot fix it and they cannot replace it or credit me. being a bit frustrated i agreed and understood. however i decide to take it to a 3rd party service to see if they could could fix it, but my tv being back from hisense repair was worst then wen i took it to them. my tv now does not even power up or switch on. thank you very much hisense.