Slow to respond, not working since update

We’ve used sendinblue for the last year or so and it was consistently having issues with stalling due to user registration spam. Now it just doesn’t work, and every response is 24 hours from the last one like it’s beneath them to work faster. It’s total garbage. Both in functionality and in their priority to customer service. We only use them for transactional emails and even that seems to be a strain. You can still win me back sendinblue but this is total garbage as it stands.