worst service and company ever

The worst company i ever have to deal with.Every month i must fone them for my data.Customer service is the wost no one ever gets back to u although they say they would

My payments is never late i dont owe them money and yet i have to fone them for my data to be loaded.Im getting sick and tired of it and i think i have a good enough reason to cancel my contract with them as they r not keeping up their end of the contract.