Being billed *******ly again!!!!!

A couple years ago I complained to Vodacom and reported it to HelloPeter, that I was being billed *******ly. After months of fighting, I was eventually refunded 5 years of ******* billing. This appears to have resurfaced again, whereby I was billed for "SMS Roaming" (Ref. S3-GSZ13-3QQUP) which to date I am still awaiting Vodacom to provide me with "proof". The matter was telephonically reported in March 2016 and a reminder e-mail was sent on 14/4/2016 and 25/4/2016. Numerous staff from Vodacom called me, however, when I ask for proof they "disappear". So much so, when a staff member called me last week he put the phone down on me! So Vodacom I suggest that you one - sort your *********** staff out and two - when can I expect my refund on the "Roaming SMS's" you cannot supply me the proof of?????