Website modifications - Deleting Features/Change of Function/Fixing Bugs

NEED A PROFESSIONAL DEVELOPER WHO UNDERSTANDS CODING WELL. AND EASY TO COMMUNICATE. WHO CAN KEEP IN TOUCH IF NEEDED IN FUTURE. SUMMARY: I have a running website with payment feature on it. It is an Indian takeway website where customer can add items to shopping cart and can select payment method (cash on collection/card payment). Magento for the shopping cart itself (where customers drop the items they want to buy) and Open Cart MVC for the website structure. TASKS REQUIRED: 1. We have discount facility for collection and delivery. Now, we want to remove discount for delivery and discount for collection will remain same. 2. Delivery charge function will be removed completely but delivery charges will be showing on Home Page (somewhere on front page so customers can see). 3. Menu will be modified with new prices. I tried to modify items on Open Cart but as soon as I edit and save it, it disappears from the list and looks like it gets deleted from menu. May be there is a problem with the function. This bug need to be fixed. 4. No discount should be added with SET MEALS. It means when someone wants to buy SET MEAL, system will not provide any discount. Ofcourse no discount on delivery as above but for this SET MEAL no discount even for collection. 5. We have auto printing feature on this site. We bought an extension from online to do auto printing but for some reason it doesn't work properly. We can talk about it when above four things get fixed. After above changes we will test all functions and if any bugs found they need to be kindly fixed. This four main changes you need to make. You can ask me if you have any questions.