Aramex extension custom change

My store is Opencart V.3 Journal 3 theme Purple tree multivendor I have this extension for Aramex shipping ( [login to view URL] ) I need to make custom changes and make it works with sellers ( so make it compatible with multi-vendor ) Kindly if you have these conditions put your offers else don't put 1- time is very important for us we need to give us a fast delivery and do not be late ( if you are not finished in the time we have dealed at then i have the right to cancel all the project ) 2- Programmer will work on the testing domain then finally after testing will move to live website then make final testing 3- any changes on the files must be done by XML changes new files can be added directly 4- Kindly check all the attachment and changes in the files uploaded ****************************************************************************************