Trying to get to the technical department

I have tried the whole of this morning to get through to the technical department to activate the MTN VPN service on my sim but keep on getting told to call different numbers that don’t lead me anywhere, I’ve been told to call 1555 which then redirect me back to the normal call center and then they just tell me to call that number again? I then got given a different number which took me to the service and repairs department but then they tell me I’m at the wrong place and to call 135 or 1555 and then it starts all over again, why can non of the call center people give me the right number, it honestly shouldn’t be this hard