We cancelled our nedbank home insurance and got other insurance

We cancelled our nedbank home insurance and got other insurance. Reference P***. Cancellation was confirmed with a letter on the 14th of April 2025. Then we received a letter stating an refund would be paid back to us. Two days later when enquiring with no communication further, we asked when the refund would be paid to us? Reply was it was paid back into our homeloan! Who gave and confirmed this instruction? We also informed Nedbank Homeloan that no installment should be paid to Nedbank Insurance. Today I notice that nothing has changed. The instalment was still added to our homeloan. This is not acceptable, as it seems that Nedbank personnel just ignores instructions from customers. I want answers Nedbank. Not happy!!!