Pertectic/no service from game stores for hisense product.

I Purchased a hisense television 2 and a half years ago from game woodlands,which closed down, now the television has lines running through the screen all of a sudden so I call customer care as it is still under warranty on the 22 of June to log a claim, all nessesary documents was emailed to obtain a replacement receipt as to get the TV set replaced or repaired, its been over 3 months and over 4 calls from me, and all I get is an email saying someone will contact me in 24/48 hours,as to what is happening, everytime I get told someone will call me back or the manager is busy or in a meeting, why should one waste money on products from *********** service provides, hisense should know the type of business they are dealing with as they have a lack of interest in helping customers with product services. We all understand the strain lock down has put on each business but 3 months with no outcome is just poor service.the warrenty expires soon and it feels as if this is what the store wants to happen.