Billing me double for the month of May

I was billed double for the month of May. Lodged a query on the 2nd of June and was told that it takes 7 days to process. We are now sitting on 15 plus days and yet no response from the *********** company! Phoned them on numerous occassions and apparantly all their managers are in meetings all of the time! Because that is the only consistent response i get from these idiots! What a useless corporation! At this stage due to them ********ly deducting monies from my account and after being told from the billing department that they have charged me double the company has breached the agreement which we entered into! I HAVE RECEIVED NO RESPONSE ON MY QUERY AND ON THE 19TH OF JUNE WAS ONCE AGAIN TOLD THAT IT WILL TAKE ANOTHER 4 DAYS,AFTER I HAVE BEEN TOLD THEIR POLICY FOR A RESPONSE IS 7 DAYS! FFS! I want to know what the hell is going on on my account. Incompetence seems to be at the order of the day at this place!