False advice and Bad Service!

I have been trying to sort my query for 3 months. Still no real feedback or resolution. They falsely called and advised of a cheaper better contract. I was busy at the time. They said cheaper. So ya. Only to be charged more on my contract. I have contacted them from the beginning to revert to old contract and fees. Though apparently that dept is only available to chat during Monday to Friday office hours. I work and can't always sort it in this time. I have had others contact them to sort the issue though they response "we will call you back". The service has gone worse year by year. I want a Refund for the past few months and my contract changed with immediate effect. This is ridiculous!!! Dissapointed since I've been a loyal customer from the beginning.