nightmare instead of a peaceful sleep

I purchased two restronic caprice beds on the 27-04-2013 after being told by a sales clerk that they great beds and good value for money. In 2014, one of the mattress begun to sink to a point where u can feel the springs. I called the store whereby they sent a person out to access the mattress. The mattress was replaced with a new one. I now have the same exact problem again . numerous calls to the store go on broken promises about sending someone out again to access the mattress. <br> I have a spine problem and sleeping on this bed has become a nightmare.<br>