Temporary loan facility T&C

Temporary loan facility T&C or not what they say. The payment method work on activity based. meaning what get deposit in your account get paid towards the loan. That i im fine with. Issue happened when i made a payment it took existing money out of my account which not part of the T&C as so funds where not deposited they where existing, I get hold of the secure chat. after explaining this they just ended the chat . The Money deposited in was 435 but they took my salary not just the 435