Rain - selling **** dreams

Rain billing / customers service is the pits. I did a sim swap on the 30th March only on the 19th April, fine that's not an issue as quired this with them they reduced the amount to a pro rata, i then called on the 3rd of may to request a cancellation due to the sim card being lost. got email confirmation on the 4th that cancelation is being processed, 9th i call in again as i see that nothing i about cancelation is reflecting on the account. i get told that an immediate cancelation will be processed i should worry, fast ward end of may an invoice is generated with usage on it, i am told i am liable for the subscription. but how if i had requested that it be cancelled in the beginning of the month already. i call in i am only now told that there is a 30day cooling period which was never communicated to me with regards to this. they bill people for even non activity.