Poor service

Vodacom overcharged me by nearly R2000 for April. Upon investigation my fibre service was overcharged as well as my contract lines. My contract lines were all migrated to different price plans without my permission. I'm still waiting on my credit for my contract lines as my bill is still incorrect. When contacting the call centre on Monday 29 April again the consultant was abrupt and insisted that I was credited. She promised to call me on Tuesday at 10:00 to confirm with me but I'm still waiting on the call.