Sleepmasters carnival mall and restonic

I made a purchase of a restonic queen bed from sleep master Carnival mall. After 2 months of usage the were sounds made by the spring on one side of rhe bed. I reported the bed after 2 months . 1. The reciever of that complaint wrote to restonic that I said the mattress was uneven and I never said such. Therefore 2 months later after visiting the mall I went to follow up and I was told the case jas been closed. And the reopened my complaint. Till today they haven't exchanged that mattress. Everything the say about guarantee it's a lie and they are just so unprofessional. I'm waiting to find time and return the bed in trhier door step and demand a full refund. It's clear that they sold me a damaged mattress 💔 😪.