Hatchette Patchwork dubious double debits!

I recently noticed a double debit of the debit order I have for a course I signed up for. A previous double debit was explained away as part of the agreement for an ANNUAL double debit to cover 4 weekly packages, as this was done in September 2017 it would stand to reason that a recurring double debit would be taken in September 2018. This however was debited at the end of June, 9 months after the ANNUAL agreement. I've had other payment discrepancies as well whereupon I gave up after not getting feedback from Hatchette. I am now fed up with being ignored and no reasonable feedback being forthcoming.