Very bad Service

I have/use a herotel fibre at home...but I'm very much disappointed about the way herotel customer service treated me regarding my fibre connection....I have a month to month contract of which I pay the account by myself....this month a deposited R429 into their account...apparently they say i should have bought a voucher....they promised to refund my money back...but to this day they have not refunded me ...I, made a payment on the 2nd of July 2025...everything I phone them they keep on saying i should expect my money within 48 hours....please assist.