Standard Bank Funeral cover is ****************

My dad as a pensioner has taken a funeral policy with Standard Bank in 2016, his cover amount was R 30000 for a premium of R86 and inon the 26/11/2018 he up his cover to R 50000 and was paying a premium of R135. From 2018 to present his premium has increased on an annual basis from R135 in 2018 to R202 which is the current premium (April 2020). But the cover amount is not increasing and is still at R 50000. When I call the call center they apologize and say unfortunately that is the way Standard manages their policies. This is day light *******, as the premium goes up the cover should also go up. Further to this they cannot tell us what the percentage for the increase of the premium will be year on year. Their percentage increase to the policy premium has no standard increase, they increase the premium to whatever they want to without increasing the cover amount.