Nedbank homeloan and long term insurance

I bought a house in 2016 by R900000 then I made a life cover which covers both me and my wife to pay the house if one of us passed away, the insurance section used the wrong bond account number until the policy lapsed, there was no communication with me about this matter, the policy was included on the bond premium so it was not easy for me to spot the difference up until this year, i called the bank just to check my policies that is when I realize that my house is not covered. I have the policy document with me, I called and called until one of the agent called me after two weeks to reinstate my policy which was fine but where we don't agree to each other is the 24 months waiting period from now for my chronic deases which we already had in 2016. I can not wait for 24 months for that because my 24 months has gone passed when they made a mistake. They are still refusing to cancel the waiting period. They claim that they communicated with me through sms while they know my email and the email is good because it keep the conversation records and documents, they also have my cellphone and nobody called me. When they want us to join the insurance they call us but where there is a problem they send sms, there are no record of 4 years back on my cellphone. I am talking about nedbank longterm insurance and homeloan it's one bank but they can't recognize that they are using the wrong bond account number that is why they did not get the premium, If one of us passed away which means my house won't be covered Review your policies you might have the same problem like me

Nhlanhla ***