Freeme Family Telkom-to-Telkom problem

On Telkom Family Freeme all calls Telkom-to-Telkom is supposed to be free. Suddenly all the multisims got a message that that you ran out of airtime for the month while only phoning Telkom numbers. According to Telkom helpdesk there are still loads of minutes left on the contract, but they cannot give an answer why this is happening. Every day I phone I get the same answer. They are still working on it. Without service for two days now.