Account blocked for ***** because I tried logging in from my cellphone

I do all of my families banking and last week I was out of town and tried logging into online banking from my cellphone in result they blocked all of our accounts and given it over to the ***** department, I phoned and was told that we should go into the bank to re-open our accounts. So Saturday the 23/09/2017 we went into the Lambton Branch and Andrew helped us re-open our accounts scanning our finger prints ext, but to my surprise that was not the end of it last night it tried logging in from my phone and whala they blocked our accounts again so I phoned this morning and they said I should go BACK to the Branch AGAIN???? because I did not login from my laptop and my phone or some ridiculous excuse. So I spoke to my family and the best result is going into the bank again and closing our accounts we cannot go into the bank every week to re-open our accounts because its reported as "*****" the reason we have online banking is for convenience and having to waste 2 hours of my life going into a Branch every week so thanks for the absolute Honorable service we received from your ***** call center and unwillingness to help you just lost 4 customers well done FNB