worst provider

I have tried contacting these people but the line just drops !!I've mailed them asking them to call me on my new number as I recently became aware that the person who should have been paying the account hasn't. I am willing to get it sorted but nobody is calling me and I'm sick of trying to reach them. Also I don't see why they keep adding on to the bill when this contract should have ended already !!!!and the line was blocked for the months they are billing. I will only pay up until the sim was last used and the contract end date . This is ridiculous<br>