[THINK] Follow-up from "Overage acceptance mailer"
The following discussion from !13774 should be addressed:
- [ ] @vshumilo started a [discussion](https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/13774#note_2851078802):
> **thought:** Yeah it is a bit unfortunate that for us `gitlab_credits_plan` is actually an id but to find the id we are now querying the `Zuora::Local::ProductRatePlan` table just to use it to query it again :thinking:
>
> **note to self!** We should do something about it specially since the "new way" is to work with this object directly :thinking:
>
> Adding the comment to resolve it with an issue so I can track this
issue