How do I cancel this as they took $19 from my account as well?

[papermoon.lady]

SmartyCash Plus I assume?

Scroll down to 8.1:

https://www.smartyplus.net/terms

You probably accepted their eBay $15 voucher that started your Plus trial (which became a normal subscription after the trial period because you didn't cancel it).

[brindabella0419]

Going forward, how do we cancel further debits?

[sandypebbles]

As has been explained numerous times (including  in this thread and several others )

Log into the account you created. Cancel your subscription.

It will come out every month until you do it.

The link to do so has even been posted in *this* very thread by another member 

Nobody else can do it for you