Isp's broadband usage meter readings too high?

I've been with Supanet for years and have been very happy with them,until the last year or so.

I have a 100GB limit,which is supposed to be downloads only,hence I can upload as much as I like. I have 2 broadband usage meters installed,that give me the exact same figures for my usage, every day. They do not tally at all,with what Supanet say I'm apparently using, but if you included my uploading in the totals,they are quite close.

I have contacted Supanet on various occasions, who say my package limit is for downloads only, but without much additional info,to convince me. They just talk to you,like you were born yesterday,telling you that downloading movies,going on gaming sites,etc, increases your usage,duh.

I know the ultimate way to monitor my usage, is to track my router usage via snmp, but my router is not compatible for this, without tinkering with source codes and stuff, which I'd rather not risk.

Would love to know,if there's any other people out there,having similar issues.

Are Supanet using the same definition of a GB as your usage meters.
Plusnet for example use 1000MB = 1GB.

I'm not sure what they use, but the difference in readings, is far greater than what that factor would make. We are talking about huge differences, eg, my meter will say I've downloaded 1GB, but Supanet will say 3GB. But,if you added my uploads onto that 1GB, mine and Supanet totals are pretty close. They've told me that they only count downloads, so not sure what I can do. I'd leave, if I didn't have 17 months left on the contract.

It would be nice to phone them up and actually get to talk to someone,who knows a bit about computers. You just get the same responses out of all them,which are pretty irrelevant to the point I'm trying to get across.

The Ts&Cs ( http://www.supanet.com/pdfs/bb_terms.pdf ) suggest that data transfers are counted which implies uploads as well as downloads.

When they call things a usage allowance they often mean download+upload

The product page talks of download, but its not totally clear

The product page says

...you have access to bandwidth usage within your account enabling you to monitor your own allowance...

so is it feasible to do an experiment to see if what combination of downloads and uploads are counted? (I know you shouldn't need to, but...)

You are sure that no one else is using your network.....

Thank you for all your input. Being a newbie on here, I am really impressed at the very helpful posts.

I have my WI Fi disabled on my router, so I am sure, there is only me using my connection.

I think I have come to the conclusion, that Supanet are counting uploads towards my usage.

Uploading twice as much as you are downloading is pretty atypical usage. Or were they not real-life example figures?

They are real-life example figures gomezz. I do a lot of file-sharing.