The true date of the request was evident in the email screenshot I submitted in my reply, so I'm not sure what else I could have done here. It wasn't a huge transaction, but I'm concerned to learn that if customers lie about when they requested cancelation, there appears to be nothing a merchant can do to win the dispute.
Does anyone have any advice?
You might get customers that lie.
But you might get customers that think they've cancelled when they haven't, from a sketchy internet connection to a workflow in their head that's different from yours.
Or they might not have realised they're on a recurring plan.
Or that small transaction means a lot more to them than it means to most customers.
If you notice a pattern or abuse of service, do raise this immediately with your provider.
2. Is it possible to refund the last charge within 3-7 days if the account hasn't been used (without contacting support)?
3. Do you send an email before each recurring charge?