Tweak & repair glitches in existing magento e-commerce site/order management app

Currently have a food delivery site that needs tweaking as certain features were buggy. Previous developer was too slow, and some features left unfinished. Main fixes: - Need to change small bits of layout of site, add links on homepage - Need to prevent delivery address being outside of certain list of postcodes - Need to fix 'forgot password' link in website - issue logging in to customer account - making sure webpage on payment secure - cvc code field states what it is asking for (description of what to fill with) - change size of checkout button/apply coupon button - alignment issues with buttons for filtering cuisines - scrolling basket while ordering food at top of menu not underneath - receive email on setting up account - newsletter signup is default when setting up account - homepage asks for a postcode to validate that you are within delivery web. rest of site needs to remember that/understand that, and delivery addresses need to be restricted to the same, but billing address can be anywhere. - changing menu visible after logging in (shouldn't show log in option after logging in) -Billing account should allow for international addresses - editing font text to match formatting - phone number that is entered should be restricted to numbers only -checking stripe working -check delivery fee structure