Poor goods quality and bad customer service

I bought a kettle and toaster combo from this company in December 2020. I returned the toaster on 13 August because it was tripping the electricity. The repairs were supposed to take 2 weeks and they were supposed to notify me. I called them after 3 weeks because nobody called me or kept me up to date. They told me that they are unable to fix the toaster but they refuse to give me a refund. They want to give me a voucher but I don’t want to buy from them again because of their lack of customer service and the poor product quality. I’ve paid for something that I can’t use for 7 weeks now.