I posted the following at webutations.com. There appear to be dozens of such consumer complaint forums. I'll keep working at this. I'll do my best to put the following review on all of them.
Learnable.com sells instruction oriented ebooks that look like a one-time-only purchase price and download. If you don't read the fine print you won't notice you also signed up for a "thirty day free trial" for a subscription of some sort. At that point they already have your credit card number, so they start charging you approximately $30 USA dollars a month for the subscription you didn't know about didn't want and never used.
When you call they don't answer the phone. I sent email. I did get a response to my email, which told me it was my responsibility to read the fine print. From a strictly legal point of view this may well be true. But this is not the kind of company I want to be associated with.
Be very careful with learnable.com and READ THE FINE PRINT. You'll end up grinding your teeth if you don't.