Shocked!

I have never actually encountered such bad service at any retailer before. I recently opened an account with Homechoice and placed an order of which only half of it was delivered. I logged a claim and was told that it will be followed up with the courier company and they would get back to me within 14 days max. It's been more than that and when I phoned in they asked me to fill in a dispute form and will have to wait longer for feedback as they don't know what's going on. Secondly I ordered another item on that same day, I phoned in multiple times as the order has said processing for 15 days, they informed me that they are waiting on stock and can't tell me when they will receive any. Today they just cancelled the order without my say so. I'm really appalled and shocked at the terrible service. It clearly says delivery 5 days and 6 weeks after ordering on the site and when I placed the order they never mentioned they were out of stock or warned me. I don't actually know what to say.