They put right their mistake
UPDATE: the company has now put this right by refunding the payment with a compensation for their error which I do appreciate. My credit card did not work on their site so I used my debit card instead. Big mistake! They took an additional unauthorised payment from my current account, 2 months on they have admitted their 'technical error' and promised to refund the money. As of today they still have not done so. Do not buy from this organisation.