Registration key Failed - Total PDF Printer

I bought the key and entered it (it was pre-entered in the registration box by you once I bought the key)
It says key not valid.
I was also sent the same key by email from you - still does not work
I have emailed you, no response.
I need this working urgently

Dear Stuart,

I have sent you the key to stuart.mathieson@cometrica.co.uk e-mail address.
Please, check your mail box.

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Best regards,
Mary Thorton
CoolUtils Support
www.coolutils.com
support@CoolUtils.com

I don't have registration code of my total movie converter v2.5 so help me!!thanks..

Dear Igor,

We send a registration code only if the product was purchased. You may
use a trial version of the program for free without a registration key for 30
days.

If you have already bought the product please send us an e-mail address
which you pointed out during registration. I cannot locate your order
by gahungug@yahoo.fr

Best regards,
Mary Thorton
CoolUtils Support
www.coolutils.com
support@CoolUtils.com