Gravity Forms & Billplz Integration with Mailchimp

I am currently using Gravity Forms and Billplz as my payment gateway. I've noticed that some of my customers leave before completing their payment, which results in their status being marked as "due" in Billplz. I need an integration that can assist me in sending follow-up emails to these customers to help them finalize their payment process.

Ideal Candidate:
- Proficient in Gravity Forms and Billplz integration
- Experienced in Mailchimp
- Can implement a system for sending follow-up emails 5 minutes after payment abandonment
- Can include specific information in the emails:
- A reminder of the payment
- A link to complete the payment
- Customer service contact details

Please note: The follow up email should be sent 5 minutes after the customer has abandoned the payment process.