WHAT AM I PAYING FOR - NO INVOICES / STATEMENTS

After I battled for how long to have my BIS on my upgrade connected I still haven't been credited accordingly.<br> <br> I upgraded to a R189.00 contract and each month i have been paying more. I am unable to download the statements / invoices as the web-site is not functional. After sending complaints to MTN , requesting that my invoice and statement is send in normal PDF i was told that i was to register on-line. I am registered on line but the web-site is not functioning. I was also asked for a pin which i do not have. I think it is totally unprofessional that one are not able to receive your invoices (not statements) in YOUR CHOSEN FORMAT. I do receive a statement by post but the amount that's being debited to my bank account is not set out on the statement. <br> <br> I haven't had any invoices since I upgraded and therefore i don't know what i am paying for every month as i upgraded to R189 including bis. Haven't had bis for how money months but i am paying every month.