Top Ten Indicators that It's Time to Shop for a New Credit Card Processing Company
Number 7:
Your processor is reluctant to educate clients about fees and options.
If your processing representative offers only one option without first asking
about your business, they probably only have one option. If they have multiple
options and they only offer one, you may be dealing with a salesperson that is
paid on a commission basis. Either way, steer clear of this processor. If your
representative doesn't know the answer to your question, they should be
scrambling to find it. If they aren't, their hiding something. 
If your processing representative skips over fees in their pitch and avoids
your questions about fees, expect hidden ones. While salespeople often use
pitches that make light of fees with words like “special-rate” or “discounted-fee,”
avoiding them altogether is a bad signal.