US Bank review: bait and switch

Buyer beware! As a start up small business owner I wanted a better rate to take credit cards. I was using Square and someone fatefully gave me the number to Joanne Yi, the representative who sold me a two year contract and a load of lies. With Square I was getting a clean 2.75% but no monthly charges. I told her I wanted a better rate than that. She promised that I would definitely receive a better rate, as low as .25 cents for debit and most likely in the 1.7% range for what my customers typically use-their Mastercard or Visa. She said that if I signed on for two years there would be NO MONTHLY FEE. She said there would be a monthly fee in the range of about 10$ for P.S.I. but no more. She knew the volume of clients I had at the time-very minimal. This woman lied through her teeth and pushed me to sign the contract, verbally promising everything she said was contained within that contract. After all, in the Korean community people really trust referrals and someone I trusted referred me to her.
Long story short, I was having unexplained fees, 25$ here, 30$ etc. being auto-deducted from my account. When I called the bank to ask what they were, they could not explain logically. Why? Because they were robbing me. This Joanne Yi NEVER told me about the third party Elavon. Never mentioned the name, never mentioned that they get a cut. So I was paying upwards to 60$ or more a month on top of the credit card use fee cut. I NEVER GOT 1.7% NOR DID I EVER GET .25 cents for debits.
After I blocked them from my bank, they sent the last fee to collections. I contacted Elavon and they told me that U.S. Bank had already closed my account after I called and argued with Joanne Yi's coworkers, because suddenly Joanne doesn't speak English. I told them I did not owe the amount they sent to collections-it was around 35$ or so. Well, today, U.S. Bank sends me a letter saying "We have tried unsuccessfully to collect the delinquent amount of $ 648.55 owed on the above account. Upon receipt of this letter, please immediately remit the full amount owed by check or money order to: U.S. Bankcard Services, Inc.
Collection Department 1717 E. Gale Ave. #110, City of Industry, CA 91745, Sincerely, Jeff Wang.
I know someone else who got tricked. Bait and switch, because that third party fee and involvement was never mentioned.
These people need to be brought down. I went right back to Square! I'd rather deal with an honest company than these sub-human, money-grubbing Korean/Chinese company. WARNING ABOUT THESE SCAMMERS. THEY NEED TO BE SUED.