To cancel your EOS Fitness membership, the first place where you should make a call is the home gym where you were initially joined. The cancellation process is conditional on the agreement of your membership and can be through written notice or a visit. Check your contract in regards to the notice period, any payments etc. before you make your request. When the process is done, request that you be confirmed in writing so that you can retain it on your side in case of any future billing issues or misconceptions.