How can I fix "denied access to network..." problem?

07025380770 Here is the number, please fix the problem

No internet connection , bad network My wife’s sim has been having problem since yesterday , there’s no internet network she can only call but no one can call her , please...

I bought a new Mifi today it worked just fine at the place I got it but as soon as I got him it hasn’t been working.It keeps saying no internet connection but I have data on the...

I subscribed a 45gb Always on data plan on my MTN router sim on Friday evening, and since then, I haven't had my data. What's the problem, please?!