Top up because claim of running out of data

I have topped up.
But get automatically charged every month when I only need a top up for a day

There should be an option to disable this in your My Lebara app BrianT5. If you can't find it contact customer support for more help.

Much too much if you accidently go over the data use.
I think it's something like £93.00 per Kb

These pages do NOT work properly Android, Chrome

BrianT5 if you go to the bottom of the community page you'll see a contact us link. You can get to the customer support contact methods there.