Upgrade of line same cost as new installation

I am writing this scathing review of BITCO as i have had enough BITCO's imcompentent staff, i have done an upgrade from the 20/2 line to the 1000/100 line and for the charges they charged me the PRO RATA Data + R1499-00 line rental plus at the end of February another R1499-00 is due which makes my upgrade cost basically the same as a new installation. Bitco in my opinion is literally *****ing from me now because there is no way a simple upgrade can cost so much. Bitco i want to know how you get to that amount R1740-78 for an upgrade to the 1000/100MBPS line that was done like 2 days before the end of the January. I can understand those charges if i havent paid for the month of January, but i did make payment on the 28th as i always do for my the month's rental. they have taken that payment as a payment on the invoice to my new line which according to my knowledge should've been payable at the end of February. Unless my maths is incorrect they have credited my old line to me and billed me pro rata for the last couple of days plus the full R1499-00 for the new line. that doesnt make sense to me as they are trying to get an extra amount of R945.78 for the month of January. I dont Care who you are or what accounting degrees you have but that does not equate, and i specifically asked them in an email that they should do it so that i do not incur any extra charges over and above the Line rental charge of R1499-00 as i wont be able to pay for any surplus charges and once again they dont take their customers well being at heart which means BITCO have shifted from being service oriented to just making money. This is not the first time there was a ****-up with my account. There is only One person i do trust at bitco and that is the marketing manager Greg Sellars. Everybody else in my opinion is ***********.