What is this for withdraw $13AUD from my account without my permission.

[kkch001]

E-bay investigate this situation rapidly.

[sandypebbles]

eBay do not read here

Nor would they investigate if the did read here

You gave permission when you signed up, and ticked you had read and understood the t&c of what you were signing up to

And there will be a monthly charge that you gave permission for

Don't tick stuff to get a $15 voucher if you have not read what you are agreeing to

[k1ooo-slr-sales]

I'm going take a guess and say smartycash Sherman oaks.  Next month it will be $19 unless you cancel the subscription (if it is smartycash).

eBay don't read here, it is a member-to-member forum.