Look for an Oscommerce expert, that has experience in the shopping cart process in oscommerce.
We have a simple ajax powered one page checkout that needs to be finished 100%
Order total & shipping works - Payment module will need to be added, customised and tested.
*The current issue seems to be with calling the payment modules
We will need a quick fix - within a few days
The person will need extensive knowledge in coding and be able to identify and fix the problem.
We need a very quick - cheap easy fix