Poor poor service

So I went to Standard Bank branch to enquire why was their home loan protection cover and building insurance were included in my monthly premium when I had opted not choose them as my insurers. I submitted the policy schedules to the bond attorneys, even signed on the documents that I won't be taking Standard bank policies. I was given a phone to call, on the phone they advised me to send emails. I send them but there was no response, I am so frustrated as I don't have the money for their policies. I chose my own and they're deducting, can someone from standard bank please call me so I can cancel their policies that I didn't authorize... Standard bank hasn't even deducted their first home loan premium but I'm already exhausted with them, why are they forcing us to take insurance with them when we have a choice to choose our own. I refuse to have the insurance deduct money, when I had submitted the relevant documents with the attorneys from the beginning.