Vodacom unbelievable to assist with blacklisting device

I lost my device and fortunately I was able to recover it. I had blacklisted it with Vodacom when I initially lost it. Now that it's recovered they are refusing to assist with u blacklisting.i have sent the documents required to about 3 email addresses that they have provided, but still nothing their customer service is ********** now they have blocked my calls to call centre as they are unable to help at all. I am really disappointed will be cancelling all contacts.