About 4 days ago my 4g data stopped working

I have a Nokia C32 and data was working fine up to then.

I didn't make any changes to settings and I have checked the APN settings are correct as per the web site.

The Messaging button that is referred to everyplace on thewebsite does not appear anyplace.

I can make receive calls/texts.

It is showing 3G but in reality I have no mobile data