Modification of the advertisement script (Osclass - Wordpress)

I need the modification of the script based on the created specification. Part of the modification is already implemented, the code should be reviewed and any corrections or improvements to the functionality should be implemented.

It should be implemented

- adding the 'piggy bank' option (a virtual currency that will serve as a payment in

system).

- adding of an option to insert the checkbox for the duration of the advertisement

- adding an additional option in the form of a website

- adding of a fee for adding an advertisement in a selected category

- adding of payments for advertisements promoted by tpay.com

- adding of a fee for highlighting the advertisement

- adding of a fee for the distinction of the advertisement

- adding of a fee for adding the "URGENT" label

- adding of the fee for "raising the advertisement", that is, promoting the announcement on the first

positions in given categories

- and Other graphics or programming patches that must be implemented for the above functions.

I will give full specifications to the email.