POOREST SERVICE - NO CUSTOMER CARE

I have been trying to terminate my expired contract for the past two weeks to no avail. I reached out to MTN through their social media platforms and I'm convinced they are ignoring my messages. I have followed up several times without any success. Oh their customer care line gives you an option to speak to an agent and then when you choose the option it says invalid option. Why have it there at all? This is the poorest service and it's really embarrassing for such a big company.