Unhappy customer 🙁

I bought a Restonic bed at Sleep Masters 2024 September, I went for Restoc because my friend recommended it. By December the mattress was sagging. I went to Sleep Masters to lay a complain, Restonic got in contact with me and asked me to send pictures of the mattress. They told me there's nothing wrong with the mattress. I am so much hurt, disappointed and frustrated. They are now using the cheap material. This mattress is sagging and it becomes worse everyday.