7 Months, return not resolved

Must be the worst customer service I have ever experienced. I logged a return for an Item on the 4th April 2024, after numerous follow ups, the item was collected to return to the supplier for repair. To date I have not received a replacement item or a refund. The agents respond to my emails with apologies, but this never gets resolved. 7 Months, no replacement, no refund. If I had to not pay my account for 7 Months I would have negative credit ratings, there must be some consequence for companies who cannot resolve customer queries and bad customer service.