went to download spybot search and destroy hijacked to thier site no one on phone contact and no download..

I went looking for free SpyBot and found a site but it said the price was (I think) about $18.00.
I decided that was ok and entered my bank details but then found it was (approx) $18.00 per year. So I did not proceed with the purchase.
But 4 hours later I have emails advising of a debit for two amounts of $52.89.
I don't know what product is nor do I have any product.