Faulty bed matress - Consumer Complaint for OK Furniture - Head Office

I bought a restonic bed in November 2020. In December it started making sounds and depressions on the side I sleep. I rotated the bed but no changes. I lodged a complaint in December and they acknowleged it and said they were closed for holidays. Went back in January, twice in February they kept promising that they will phone but in vain. The bed has gotten worse 4months later. It has depressions and makes spring sounds. I'm very disappointed since they are silent.