Teneo loggs kids out even though payments are up to date

So disappointed in Teneo's accounts department. They keep telling us that our fees are behind with a month, and that after we've send them all relevant proof of payments from our bank stating that we are up to date with our payments!! What's going on here??!! How much proof do they still need? My child get's logged out of her Canves without any e-mail correspondence from there side and this happens a week before end exam. ABSOLUTE TERRIBLE service to say the least, and I see we are not the only Teneo parents complaining about the same issue. Please sort out your accounts department, cause this reflects badly on your side!!