You might not have enough volume/errors for Merchant Advocate to save you more than $100/month, in which case they would not take you as a client, or you might find/feel that your processor is doing something wrong or not doing somethings right so you are upset and want to change or maybe service is not good enough etc. and you want to switch processors.
If so email or fax a current statement (3 if over $50,000/month) to see what you can save no obligation for an evaluation.