Feature Description

[WorldpayWPG] implement webhooks for payments and refunds

Possible Implementation

[WorldpayWPG] implement webhooks for payments and refunds

Have you spent some time checking if this feature request has been raised before?

• I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to submit a PR?

Yes, I am willing to submit a PR!