HISENSE AND OK FURNITURES - ZERO & BAD & POOR WARRANTY SERVICE ASSISTANT

Bought a HISENSE side by side fridge from OK FURNITURES in 2017 to be paid over 3 years and also paid for an extended warranty. In 2018 the one side of the freezer started over-freezing that I had to either switch off the fridge for 2 days for the block of ice to clear, I reported the issue to OK FURNITURES and 2 different technicians came to check but did nothing. I tried following up with OK FURNITURES but got no help. its now 2021 and I have not been assisted, the fridge is even worse that it has rusted. now I am told warranty has expired and I cannot be assisted, even though I had reported this and tried following up to get help. Its a very disappointing situation that I have to buy another fridge after this short period of time... and it was an expensive fridge for that matter....