*****ulant upgrade - no feedback for 2 months

We have a business contract with Vodacom and someone **********ly upgraded 3 of our contracts. This happened more than 2 months ago and I still don't get any feedback with regards to this query. The reply I get from the store manager is that they logged a query and waiting for feedback. when I called their support centre due to lack of support from the store I spoke to Bongani and he said he will sort it out I shouldn't call anybody else. I sent him a test email and another email just to respond and see if he is getting my mails but nothing from him. this was now 5 days ago already and no feedback. is there someone else I could contact?