Bad service from the store

I bought a Sansui 40 inch tv back in 2018 and still paying for it. Last month the tv just went blank and I took it in, the store manager assured that it was going to be picked up by the supplier and taken for repairs. It's now a month and I went to check if there was any progress, to my disappointment the tv was still in store as I asked is there nothing else they can do because I'm still paying for it and I have only August left to finish paying. The manager said no there's nothing they can do the suppliers refuse to pick up the goods because of Covid19. This is really stressful and a very bad service I need a new tv or they will lose a customer.