UNKNOWN INCOMING CALLS FOR 4 MONTHS!!!!!!!!!

It has been 4 months of a struggle and a terrible service. All my incoming calls are unknown and i have been requesting for assistance since May 2021. All that your agents say is they have referred the matter to the technical team as it is beyond their powers and they close the query in 3 days. I use my number for both business and personal purposes. I have been back and fourth on other social media platforms begging for assistance. MTN what is so difficult from assisting with this? Is it safe for me to receive unknown calls? For business how do i call clients back when i don't have their information? why is my safety and job put on the line? Is it that difficult to assist your own customers? Yes you have a lot of clients and my contributions are probably just a drop in the ocean, but this is no way to handle customer queries. As soon ad you realize that you are paying technicians who cant even get their job right, you will also realize my contributions are not a drop in the ocean at all. FIX THIS.