Keep your word

It is always sad when you receive poor customer service , as it puts you off instantly , I recently decided to stay with M Web , after cancellation , and to increase the size of the LTE product I’m on , I had to speak to cancellations in order to do so , the man I spoke to , was very friendly and he told me , he is going to give me a discount of 10% for staying with m web , I was so impressed and delighted , however when I received my account , there was no mention of the monthly discount , I phoned m web , and the person told me not to worry , even if it is not reflecting , the correct amount would be deducted , sadly the full amount was now deducted , my point is , why offer an incentive , and then not give it