Changing of a handset plan

I bought a phone a few months ago in greeanacres and required split billing between me and my employer. I informed the consultant who said he cant do it at branch level however i can call in and change it through the call centre. So I did just that but i was told I should have taken Telkom business, now I'm stuck with my contract for a whole two years and pay for all calls, business and personal due to incorrect information or advise given.