Pathetic service from VODACOM BUSINESS

I was contacted by a Vodacom Business Sales Agent called LINDA on the 4th June 2020 offering me some discounts on my cellphone contracts. After accepting her offer, effective on 1st July 2020 ,I noticed that my bill went up by R240 , instead of decreasing . She also migrated a different cellphone contact to a higher package , WITHOUT my consent, costing me an extra R260 ...so my entire bill went up by approximately R500 , instead of coming down, as promised. Upon contacting VODACOM BUSINESS everyday for the last 4 days in a row and speaking of many different call center agents , none of them can resolve my problem, nor reverse the migration. I have been promised to receive a call back and a response from Managers incharge , but have received no feedback. PATHETIC SERVICE and Inefficient Sales staff that clearly dont know how to do their job .