No notifications received to lock the no.

I have contract with vodacom unfortunately am owing and they locked my phone on 30 march. The same day I called them requesting the to open my line and according to agreement I must pay amount of 3300 before the 3rd of april before they s****ped my no. The following day on 31 I paid the amount they requested. On 01 april i called them again to request to open my line they said the no is s****ped. It was before the agreed date why they s****ped my phone without notifications pls open my line.