Worst customer service ever!!

Last year October I accepted the sim only deal for 3 years as my cellphone contract came to an end, for the past 11 months they have been loading the minutes and data as per signed agreement. Last month they load correct data and incorrect minutes, I queried about this on the 20th of October to date there is no solution. I’ve sent them the signed contract 3 times and all they say to me is ‘a query has been logged with our support team’ query for what? The signed contract states it all and for the past 11 months you’ve been loading correct minutes and data, what changed in October?? Nobody could answer that, all they saying is query has been logged. I fail to understand why it’s not resolved cause evidence is on the contract I signed with them!!! Worst customer experience ever!!! Once this query is resolved I’m canceling the whole contract, I can’t deal with them anymore 🚮🚮🚮🚮