Bad mattress and services

So disappointed by this company, I bought a mattress over a month ago by the mattress warehouse, firstly took a week to get delivered after I had to phone them to find out when I will receive my mattress, then I received it but the springs are open on the one side this is a Restonic mattress 😱 made contact with them straight away no response I had to phone them weekly to find out when they will replace the mattress " early next week has been the answer and we are still waiting... How difficult can it be ? Now we hope to get them moving before they say " oh we are closed for xmas