Need an expert codeigniter developer for saas billing module with PG integration

We have saas based codeigniter project there have 4 user group. We need online billing module for it, it should work for every user group accordingly. Seamless payment gateway integration for multi-submarchant account. SaaS Billing module for online payment: 1. Presently billing is subscription basis; one time but I need various subscription accordingly features( present) and commission or fix amount payment on each doctor’s appointment. This payment should Charge will be on only new appointment NOT for followup appointment. 2. This billing will be present in system as module with various features. 3. Online payment will be as additional feature for doctors, so admin can decide who can get this or not accordingly subscription. 4. GST enabled. 5. Doctors can see his complete accounts, payout and given commission 6. This billing should work with online payment and offline payment. 7. Doctor can see the payment setting for him only 8. Supper admin can set only commotion as explain point # 1 9. They can not payout without giving the commission. You can see our another demo as example( can be seen after award accept) it will give you clear idea 10. Payout details will be reflect in doctor and admin panel too 11. Doctor can see their money as in wallet. 12. Wallet amount will display on dashboard. 13. In every 23:30 hr auto payout. 14. Patient also can see their transation in their account. 15. seamless payment integration for all doctors through out gateway. 16. sub-merchant’s settings will be on doctor panel 17. Total payment gateway(PG) integration setting will be in admin panel. Admin should not go to PG panel for his daily activities. Followup & Payment: 1. Need an optional for followup appointment, Followup appointment should be possible within certain days which could be set from doctor settings and the following visit charge and also can set followup fees from consultation fees setting. Online payment: If there have any problem in offline payment module then need to fix and tune with entire module.