Duplicated our policy

We took a funeral policy with Liberty in 2012 whereby covering 4 kids and two adults (my husband and i)paying a premium of R134.55In 2014 she came to tell us we should increase cove for my 2 kids who are reaching 25 years. The cover was increased from R500 to R10 000 each.on the 12th I gor a policy schedule from Liberty only to realise that instead of her just increasing their cover she opened a new policy document.which covers only my husband and two boys who have reached 25yrs. In December one consultant called me to tell me that my children are becoming off age what do I do.I told them that I will increase their cover which they did..my problem is my two children's are duplicated and e are now paying R432.05 covering 4 kids and two adults. Which is too much for a funeral cover.I tried to explain to people of Liberty that we want the second cover to be cancelled as it is a duplicate of the policy we took in 2012 but unfortunately they try to convince me not to.all what we want is the policy to be cancelled as we did not ask for the 2nd policy and they should refund us.we are paying too much money for a funeral cover