Hidden costs

a while back I had the misfortune of signing up for the Adumo payment plat form as they offered a slightly lower rate that I was paying at the time. They basically locked me in for 24 months rental of R361.33 per month on the speedpoint device . At the time the saving with the lower rate more than covered the monthly Rental rate. Almost a year in I was approached by another competitor with a lower rate which was a no brainer and I signed up but the advantage is to buy the speedpoint device upfront for R499.00 . The Monthly Savings was quite substantial and I was happy to pay Adumo the monthly rental despite not using their speedpoint. Then as of September they started to charge me an extra R500.00 and when I queried this, they stated it was a minimum transaction fee. I have been in business a long time and I have never come across such exorbitant fees charged for a payment platform that you arent even using. Fortunately the contract expires end of October and I will be rid of the most expensive payment platfom on the Planet !!!