Build SMS Sending Portal

I need you to create website where users can register buy sms credits and send in bulk, using their panel or through API services.

I want you to use NextJS.
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Pages needs to be created:
- Login/Register Page with OTP
- Customer Dashboard
- Send Quick SMS
- Bulk SMS
- Contacts Page (Import From CSV or Link)
- SMS History
- Settings (API, User Profile, Subscription Settings)
- Buy SMS Credit (Stripe & PayPal Payment Gateways)
- Design Must be Mobile Friendly

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Admin Panel:
Dashboard to view stats
Sales / Invoices
Customers (Add/Edit/Delete)
SMS History
Black List (Black list by phone number or Words)
Settings
- Website Settings
- SMS Gateway Integration
- Payment Gateways


You must have experience on SMS Gateways and characters counts..etc Phone number format should be automated and corrected to correct formats.

Currently we are working with Clicksend SMS Gateway, if you know any cheaper provider for UK we may use that too.

I have just designed some plans for customer panel please check for your reference, you need to create with better design and MUST be compatible with MOBILES.