Debit date on funeral policy

I am have a problem with capitec Bank regarding the debit dates. My details are as follows: Names: Moselekwas Johannes, Surname: Mohae; ID No' *** My police No is CF***9 We intial agreed to the 25th of very moth as the debit date and it was change to the 30th of the month due to the reasons they stated to me, Like if the 25th falls on a holyday then debit will run three days before the agreed date, so decided to chang the dates to the 30th on every moth and i signed for the amendments.Today I recieved an SMS from Capitec Bank to infor me that premium will be collected on the 17th of Dec. I contacted their call centre and I was told that there is nothing they can do. I think this is the way of making us to default on the policy and lose our money. I think our Agreement must stand or else my money must be returned. Please assist