Hello Douwhoiwoas30
It is possible that one of them is only a payment authorisation and not a double transaction. I recommend that you get in touch with our Contact Centre at 0848 44 66 88 (CHF 0.08/min.) or at +41 51 225 78 56 (from abroad) to check this.
Alternatively, you can go to the counter. Here you will find our opening hours.
I wish you a lovely day,
Chiara_S