Game cellphone

Not to happy with cellphone department. Ladies are not clued up with process and figures. I was due for an upgrade, my old contract was with 2 hand sets. So the lady processed 1 for my upgrade, she says the secondary can't be upgraded. So I took another new contract and come end of March I am still getting billed from vodacom through her mistake stating its canceled. Even the pro-rata figures which got debited was wrong, the lady should not be assisting with that particular department.