T-Mobile web sales problem

NinaMS

I have a t-mobile contract phone and used their web site to upgrade my phone and renew my contract. The site told me to renew my contract and then to pick the phone I wanted to upgrade to. I had waited weeks for the phone I wanted to drop down in price (which it did, by half); so I set about renewing my contract and getting the upgraded phone. Two weeks passed and no new phone. So I rang them up (took me an hour on the phone and passed from pillow to post), to be told that they had cancelled my phone upgrade because they thought it was a mistake as I had renewed my contract at the same time and that if I wanted a new phone, I would now have to pay for an upgrade or loose the £12 a month discount on my line rental. I replied that that was not what the website had offered me, to which she replied that there was a problem on the website and that it was the Internets fault, not hers. (To which I chuckled at immensely, as I’m a software engineer; and informed her that it was not the Internets fault but the monkey who was pressing the keys/buttons!) However, she said I had to choose to keep my old phone and have the discounted line rental or loose the discounted line rental and pay for an upgraded phone.
She eventually transferred me to web sales, who apologised for the mess up, offered me a £5 line rental discount and offered me an upgraded phone. They asked me which phone I wanted, so I told them I wanted the phone I had chosen and ordered two weeks previously. They said, no problem, you’ll have it in two days. I asked how much the phone would be, and they said it’s free; so I said ok, knowing that it had been just over £100 when I ordered it the first time, I thought that it was a good will gesture. When they posted me the phone that they said I had originally ordered, it turned out to be the wrong phone, one which was an over two years older model. I checked the web site again, and the phone I ordered was no longer available to buy on the web site, it had totally disappeared. I needed that exact phone, as I have numb hands and fingers and cannot use a touch screen phone or blackberry, and had tested that particular phone in the t-mobile shop (the woman who was serving me let me handle her personal phone) to make sure that I could handle it and use it without trouble. I asked if that phone was available on my upgrade, she said yes, and that I should wait a few weeks, nearer to the time when my contract would need to be renewed, then the price would drop, which it did; so that’s when the trouble started….when I went to do it on line!!!
I’m really stuck now, I have a phone I don’t want and can’t use too well, all I want is the phone I originally ordered!
HELP!!!!