I think I accidentally made a payment that I didn't want to, can I stop it?

Login to LaTAP as soon as possible and click on the blue “Requests” link. Here you will see a list of requests waiting to be processed, as well as those that have already been processed. If the payment in question is still waiting to be processed or pending, you can click on the blue payment link to open a new screen that will allow you to cancel the request by clicking on the “Withdraw” button. On the requests screen, you can also search for the request by confirmation number.