No respone on my request to fix their own error .

I recebtly requested to be merged to a more expensive contract and was assured that it would be done. Needless to say, the call center staff migrated me to the wrong package where I end up paying more for less. I have had numerous calls with their customer care staff where they admitted the error was on their side and that they have logged a query with IT to get it resolved within 24 hours. It is day 5 now, nobody from the call centre can help me other than telling me the query was logged days ago and that they have no direct communication with the IT team. I am so frustrated having to pay for their mistake and getting no assistance to fix it.