Greater STL Rental

I received a letter almost 2 weeks ago notifying the tenants they have merged with a new company. They told us their website that take payments will be closed. They also included a payment fee schedule. They have fee's for every way to pay our rent. No matter how I pay my rent, there will be a fee to be able to pay my rent. My lease does not say there will be a fee to pay my set amount for rent.