False information provided

I would like to share my complete disappointment in MTN. I have been a client for 3 years. Recently I was contacted by once of your consultants to offer me a better plan where I would be paying cheaper. I Then wake-up to a debit order that is R500 more than what the consultant confirmed. I contacted MTN this morning and spoke to Nomhle Qoza who was able to advise of what I was billed for tell me why I get charged pro rata and migration fees that were never even mentioned on this call, This is ridiculous that your consultant provides clients will false information. When I ask lay a complaint with the sales department I am told they only work Mon-Fri so I am expected to wait until next week. I have never been so disappointed with a company and this is the second time you disappointed me with your services in the same year. I will be taking this further.