unpaid beneficiary complaint

An urgent matter!!! the company has bad service and im very dissappointed. i am a beneficiary, my father passed away the year 2003 and i never received any money under my name. from 2015 i wanted to claim my money so i went to their offices. and they asked for my documents and i did send them but still i havent received anything or given any feedback. from 2015 they have been asking one and same things and i do give it to them but theres just no progress on my issue. February this year Mr Devika Peritum if im not mistaken was called from the Durban Branch and he said they are still doing calculations who does calculations for 8 months. anyways yesterday i went to the durban branch again and the lady assisting couldn't assist since the people handling my files were not picking up her calls. another thing that doesnt make to me is that they said they will pay me a lumpsum from only the year 2015, what about all the money i was supposed to be earning from 2003 the year my father passed. Id really appreciate it if im assisted with my matter because i really dont know what to do no!!!