Build an Online Store www.vantagekart.com

Hello, Our website is already live. But we want to fix some issues. Issues are as below. So give us timeline and cost to resolve all of this. 1) Newsletter format and subscription demo 2) Payment gateway issue - Checkout and payment release and partial refund 3) also bought products - horizontal scroll 4) over the brand page auto load 5) SMS and OTP for user validation and order validation 6) Order status- payment successful, invoiced, dispatched , delivered , cancelled , refunded. 7) Buyer GUI - whole dashboard should be user friendly . can track order from panel. 8)Login with Facebook, gmail (It's Gui should be user friendly ) 9) Comparison issue - should not compare 1 product 10) customer should notified when any update from our website regarding order. (dispatched, delivered,cancelled) using mail and sms both. 11) Daily deal issue - everyday it expires around 7 p.m. , there is only hours , minutes and seconds in remaining time 12) on product page there is a (use this coupon and get this product at this price) 13) integrate whole accounting data to tally 14) courier tracking in buyer dashboard 15) out of stock - with login and without login(if user logged in then there should be email address(auto filled) of user instead of blank box 16) RMA 17) Coupon validation - per account usage , total usage , value limit usage 18 ) wallet 19) delivery time and pin code serviceability on product page 20) pop ups(newsletter registration) 21) validation (when user subscribe or register) 22) Security and ssl certificate installation