No compassion shown

My monthly subscription was not processed on the first of the month due to the bank systems processing payments ahead of monthly debit orders. When requesting Momentum of move the monthly subscription to the 17th of the month, was advised that an additional amount, equal to half of my monthly subscription would be payable on 1/6/2024, plus the full amount of the monthly subscription for May 2024 on 17/5/2024.