Shopify Developer for Clothovia Store Customizations

We are looking for a skilled Shopify developer to make specific customizations to our online store, Clothovia, with a strict completion deadline by Friday. Please only bid if you can confidently deliver within this timeline. The requirements are as follows:

website - clothovia.com
for return - returns.clothovia.com

Requirements:

Checkout Modifications:

Set phone number as mandatory in checkout, with OTP verification via WhatsApp.
Make email optional (secondary) in the checkout process.
Remove the Google sign-up option from the login and registration pages. Enable login and registration via mobile number with OTP verification only.

Return Process Integration:

Currently, customers return products via a separate URL: returns.clothovia.com. We want to integrate the return process within the main site, clothovia.com, to streamline the customer experience. Ensure the return process is smooth and accessible directly from our primary platform.

Email Template Modifications:

Customize and improve the Abandoned Checkout and Post-Purchase Thank You email templates to enhance engagement and conversion.
Timeline: This project must be completed by Friday. Please bid only if you are confident in delivering all requirements on time.