Party hall booking App Development

I need an Android app. I would like it designed and built. If you can develop this app within 15 days with backend then we will give you two more projects. Source code will be our property. There will be two panels. Customer panel Partner panel On customer panel, you will have to display marriage, party halls, photographers, decoration vendor, catering vendor, etc. With price list, discount display, discount coupon apply, feedback and rating infront of all vendors profiles, location on google map, add to cart and buy now button infront of all profile. For partner profile, we will discuss later. Otp and email authentication on customer and partner profiles. One mobile number and email i.d can be used only once for signup. Customer can post feedback and rating after making payment of any service, customer should have the option to request for his order cancellation, customer can ask for refund. Customer can chat with partner, can see partner's location on map. Customer can bargain price by making his offer infront of displayed price by partners. Customer can view all their activities on their customer dashboard. Customer should have the option to add filter according to their budget, location, occasion, gender, preference and save it. After that app should send him notifications according to that only. Customer can remove feedback or rating given on partner profile. Source code will be our property.