Vodafone number deleted without notification

I have 8 contracts with vodacom however I only have 1 prepaid SIM card. Today when I put this phone on as I did not use this phone I found out that my number is not registered on the network yet 31/01/2018 I had used this number which means 147 it has not been used for and vodacom will only delete the number after 185 days. I did not receive any sms or notifications that my number will now be deactivated and reallocated to some other user, 5 of my contracts have 786 digialts in them and this prepaid one had 786 degits now I have lost the number and vodacom says there is no way of reactivation. I need this number urgently as I was going to make it a contract number in 2 months time.