Terrible Service from Miway

I have been with Miway since 2010, I have always had about 2 vehicles insured with them at a time. I had an accident in 2013 with another vehicle of mine which was 1999 model and was happy with service I received at that time. I had an accident on Sunday 15th April 2018 with my 2008 vehicle which has been insured with them since 2010. There is very little damage on my vehicle which still driver-able. They have concluded that my vehicle must be written off because damages exceed the R5000 plus limit allowed for repairs. I will then receive the market value less my access which would mean I would need to add a additional plus minus R30 000 to purchase another vehicle that the same age and condition as mine. If I take the buy back option, I will receive the vehicle, less the excess I it will leave me with plus minus R1000-00. Then to repair the damages it will cost me between R10 000 and R15 000 at most. Now the question that bothers me is why does Miway not during the time they take my hard earned money not indicate to me, that should I have an incident I will only be covered for R5000 plus for repairs, so that I could have made an informed choice to continue paying my money to them for cover that does not really help me in the case of accident.