Bad service and suspension of line after paying contract on time as always

Good day. My husband have a contract with MTN, for the past few months we have been paying the contract via eft. On Monday 10 Aug 2020 his account was suspended after he paid it on 1 Aug 2020. He can not phone 083 135 from his phone due to suspension. He is at work untill 5 in the afternoon, the MTN shop closes before 5 due to covid. I have phoned MTN head office in Randburg, they refuse to help me as i am not the account holder. They also refuse to phone my husband and assist him in this matter. This is unacceptable.