New contract different from what was agreed
My existing contract expires at end of month and monthly costs were about to go from approx £57 to £99. I telephoned and eventually was offered same services for £55.66. I said I needed to think a out it and was given a week. I a tally decided to go for a couple of days later but was told the system had increased the price and agent I spoke to was unable to honour the offer from two days before. Proposed solution was the new price would be £70.66 but with a £15 monthly discount to get it back to price I was offered initially. I agreed but since then have recekved formal contract that makes no me too do the discount. I have also revived an email with bill details with the same message and alow on the App the bill is showing monthly payment due of £70.66. Has this happened to anyone else where they are onto a different contract than agreed. When I phoned back I was told it takes several days for the discount to appear. This didn't make sense to me so although I am waiting, I am concerned. Obviously I have the 14 day cool off period but this will probably not be enough time to switch to new supplier since I will need new cable laid. Basically has this happens to anyone else?
Jamie