Vodafone India — cancelling vodafone postpaid

Kindly cancel my vodafone postpaid connection as my sim is lost all the dues are cleared. I'm unhappy with your service. Please take it on high priority basis as i don't want to receive anymore bills. I took the as a prepaid sim from chennai later ported to kerala where they said after using it as postpaid for 3 months then only they will be able to change it to prepaid. After 3 months visiting to vodafone centre they asked me to come this day that day went more than 3 times and my issue was not sorted post which i lost my sim.