Systweak Software review: unauthorized charges to my credit card 4

Please advised, the two charges below totaling $30.80 charged against my Visa card are unfamiliar to me. I do not know either or do I do business internationally.
01/22/2013 2 INTERNATIONAL POS FEE VIS 0121 DF $0.90
01/22/2013 1 SYSTWEAK KOELN DF $29.90
my contact info is shelia butler, royaljubilee2002@yahoo.com - I would appreciate an immediate refund -

Thanking you in advance and looking forward to hearing from you -

REF.#[protected] ordered Reg Clean 3/6/2013 I was charged 29.95 twice the same day and I would now appreciate my money back as I was charged twice and for this I am not a happy customer.. cancel all further charges to my account which is vali until 5/5/2013. Thankyou Janet A. Schilling jschilling439@hotmail.com

I'm not sure what this company does, and obviously there are many issues of unhappy people. I was charged as follow:

04/09/13 DEBIT CRD PURCHASE 04/08 SYSTWEAK KOELN DF 434258XXXXXX6901 [protected] ?MCC=5734 $29.95

I did not make this, nor authorized, any such purchase. Therefore I would be gratefully appreciate an immediate refund to my account.
Contact Info. [protected] or sheila_sykes62@yahoo.com

In my last credit card bill, I noticed a charge of € 42.32 (receipt number [protected]) without my concession. I request for immediate refund.