Is GYMNATION serious !?

I completed my 12 month contract and requested for cancellation on 13th of March and as per the email, they are stating that they will be charging me for the month of April since they require 30 days notice period, which itself is kind of absurd even my job here doesn’t require 30 day notice period. So my concern right now is as per the email, are they going to charge me for the month of May and if so WHY!?!?

I completed my 12 month contract and requested for cancellation on 13th of March and as per the email, they are stating that they will be charging me for the month of April since they require 30 days notice period, which itself is kind of absurd even my job here doesn’t require 30 day notice period. So my concern right now is as per the email, are they going to charge me for the month of May and if so WHY!?!?