Worst customer care ever

I bought a bed last year on lay by paid it off and received a bed in November. The bed wasn't a good bed so I got a replacement mattress within 2 months of having it delivered. The second mattress gave a problem And they offered an upgrade in February but no bed arrived. No calls or notification when it will. Been calling weekly and now daily. Everytime they say it will arrive in two days time but never arrives. When I call head office to speak to a manager they hang up "once you get transferred through" no one ever calls you back when they say they will. It's up to the customer to call all the time to hear different excuses each time. I want a manager to call me today to sort this out immediately.