Vodacom - Terrible service contiues....

Two days ago, I wrote a review about Vodacom and their terrible service, well the terrible service still continues. ... Yesterday, Wardah from customer service, was supposed to phone me back at 11am, regarding a 24 month handset contract, which I started paying in July 2016 - Vodacom wants me to pay untill October 2018. All the invoices are my evidence yet Vodacom is unable to obtain these invoices, not even the accounts dept have this information. When Wardah phoned she had no info available and asked me to email her 4 years worth of statements.... I asked her if she could get this info from vodacoms account dept because afterall thats what that dept is for.... Now its been 24hours later and I'm still waiting for Wardah to phone me back, how long should I wait? And still terrible service continues...