Waiting 20 days for my phone

I have since made an access payment for my phone to be repaired on the 5th of June. I called after a couple of days to find out how far they are and was then told to fill in their declaration form. After doing so I was told it would take 7 days. Whenever I call I'm told I'll have it delivered today or tomorrow. Every day I call I get the same response. Now since the 18th I'm told it was on it's way. I call and make follow-up daily which costs me. Today I'm told it will take 48 hours. This is after I was told "today or tomorrow" What saddens me is that on a monthly basis they take my money for a phone I don't even have. The past week I had to make sure I'm home so that when RAM COURIERS deliver, I'm available. The same thing happened the last time I had my phone booked in. It also happened with my husband's phone. What do I need to do to get My phone back which I pay for monthly???