Insurance mess up

I UPGRADED on one of my contracts with Vodacom this year. When I upgraded the sales person that helped me asked if I wanted insurance on that specific contract number and phone. I said YES. That phone got ****** yesterday 22/12/2015. NOW I submitted my claim, then I was told that the insurance was taken out on the other contract number and not the one that was ******. Now your mess up is NOT my problem. I asked for insurance on the contract that was being upgraded, never ONCE brought up the other contract or contract number. Please advise what will be done about this ASAP. Because we are not happy about this at all and refuse to except this \excuse"from you"