MTN on Strike hurting Customers

I have requested a simple Invoice from MTN for over 2 weeks now. I phone them daily, after waiting for 30min+ I finally get through to a agent. After explaining that I requested my invoices 2 weeks ago, the tell me they have to request the invoice again. When I asked if could speak to a supervisor I was informed that they all on strike. MTN debits my account every month without fail, and yet cant even provide me with a simple Invoice. I'm concerned that the strike is impacting customers directly to a point where staff are purposely breaking systems for customers to be impacted. Can a simple Invoice request really take over 2 weeks?