Shopify Subscription Tier Configuration

Job ID: 40569183

Budget: £20 – £250 GBP

Need someone asap to work with me to configure two subscription tiers on Shopify that can do the following:

Memberships — Requirements Scope

Member tier
Price: $100/month, ongoing (12-month minimum term)
Each $100 payment → $100 store credit
Discounts: 20% off sprays, 25% off ouds & attars
Member discount applies on top of any sale discount
12 months of free samples with every order

Collector tier
Price: $1,000/year, payable in 1, 2, or 3 instalments ($1,000 once / $500 × 2 / $333.33 × 3)
Instalment plans must auto-stop after the set number of payments
The Collector Tier attracts a $200 credit to subscribers that is paid pro-rata if paid in instalments Credit released per payment at 1.2× (full $1,200 / $600 each / $400 each) — never all upfront
Discounts: 30% off sprays, 40% off ouds & attars, from day one
Collector discount applies on top of any sale discount
Discount must last the full 12 months even after instalments finish


Both tiers
Membership fee becomes store credit (never charged as a plain fee)
Store credit never expires while a member
Discounts applied automatically at checkout via customer tag

This is an URGENT requirement. I have tried various Stacked App approaches and also created a Shopify Flow Workflow to add store credit whenever a Product Tag for the relevant Tier product purchase is triggered. But I am not feeling too well and need help getting this across the finishing line in the NEXT 3-4 hours.