MTN refusing to resolve recycled number issue on data-only SIM

I took out a 24-month data-only contract with MTN for use purely as a second SIM for mobile data. From activation, I started receiving frequent voice calls and SMS intended for the previous number owner, including personal communications from people who clearly know them.

I logged this with MTN Customer Care and specifically requested a network-level bar on incoming calls and SMS, as this is a data-only service and voice/SMS are not required. MTN repeatedly responded with generic explanations about recycled numbers and even provided instructions that only block outgoing calls, which does not address the issue at all.

Despite multiple clarifications, MTN has failed to escalate this to technical support or provide a workable solution. The service is not fit for purpose, and the ongoing receipt of third-party communications raises POPIA concerns.

I am requesting that MTN either disable all inbound voice calls and SMS on this SIM, or assign a non-recycled data-only number, at no cost. To date, MTN has simply avoided resolving the problem.e on data-only SIM