Avbob not paying back my premiums

hi, i joined Avbob in September 2017, i covered my grandfather with this policy number; GT ********** X5 & GT ********** X6, i was paying R390, the commencement date is was 1/11/2017 with the waiting period ending on 2018/05/01. the thing is my grandfather passed on in April, i went to Avbob to claim my premiums since they told me they can not help with the funeral. i was surprised when i was told no my 6 premiums will not be paid back to me.