Lewis stores don't care about their customers

I am having the worst experience with Lewis. I bought a laptop on credit which only worked for a few months so I took it back to the store in November 2021 and today is 21/06/2022 and I still don't have a new laptop or a fixed one and they are are still debiting me, even though they made me sign forms agreeing that the account will be ceased and I will be refunded all the money I've paid since I purchased the laptop in May 2021. I have called and visited the Plaza branch dozens of times, trying to get this issue resolved but it seems like these people just don't care about me as a customer. I AM NEVER BUYING FROM THEM AGAIN!!!!! Their service is disgusting!!!!!!!!!!!!!! My email address is *** if anyone from Lewis is willing to correct this. I have even called their head office but they just hang up on me. Worst customer experience ever!!!!!