Poor service and incorrect billing

A sales representative phoned me with a internet package, 4mbps uncapped line for R239.00 plus line rental from telkom at Mweb. I was assured that no extra costs will be deducted from my bank account. but at the end of the month there was 3 extra amounts of R49 deducted from my bank account for a rescue box and two other deductions I didn't know about and did not agreed upon. The line is very slow. I am paying for a 4mbps line but is running at a download speed of 65.4kb/s and upload speed of 55.5kb/s. According to the technicians the line will be slow for the most of the month. Going over to mweb was the biggest mistake I made. The technical support is now help at all. This is the poorest service delivery I experienced in my life.