Shocking service from the cellular contracts staff

I went to get an upgrade on an HP laptop deal. I was told the deals were finished. Then yesterday I saw the brochure online and it ended on the 8th of Feb. I was there on 30 Jan. I phoned them to complain and they promised to get back to me. They didn't. This happened twice yesterday. This morning I phoned and was put through to 7 different people and then the phone was put down in my ear. I phoned the manager who told me to hold on, then he put me straight back to the department that had given me all this grief. No follow up, nothing! I am now told 'sorry, the deal is finished'. The deals they are offering now are not nearly as good. I really feel that they should make a plan to give me the deal I requested, because I was well within the time period of their advertising. One thing's for sure......they have just lost a customer.