Ridicoulus Data transfer restrictions

I purchased 2gb top up data on 11 May 2020, this data is expiring on 09/06/2020. Unfortunately due to the death of my son he will not be able to use this data. I have tried to transfer this data to another number and contacted Vodacom and was informed by their service advisor that I will only be able to transfer it when there is 5 days remaining on the bundle so on 4 June 2020. Vodacom advertises that you can transfer data but they do not advise that they have restrictions - I don't use 4gb of data in a month so how will I use 2gb data in 5 days - surely if I have paid for the data, I should be able to transfer the data as I please without any restrictions during the period that the data is valid - I fail to understand why you can only transfer it when you have 5 days remaining and if I don't use the data in 7 days, the unused data will expire, effectively resulting in data theft by Vodacom