Bad Communication to the detriment of a client.

Purchased 100G on a USB modem from Cell C at Tygervalley on 31 March 2018. At that stage the carry-over of unused data had not been finalised/approved. The unused data was terminated on Saturday, 30 March 2019 at midnight. Upon enquiring at Cell C offices at CapeGate on Monday, 1 April 2019, was advised that the request to carry-over the unused data should have been made on Sunday, 31 March 2019. THERE HAS BEEN NO NOTICE FROM CELL C THAT THIS PROCEDURE/RULE EXISTS, TO ALERT THE CLIENT IN ADVANCE TO ENSURE THAT THE CARRY-OVER DATA WOULD BE SUCCESSFULLY TRANSFERRED. The "lost data" is significant, in excess of 35G !!!!!!