Absent invoices & Older model replacement

I am tired of trying to get my invoices from MTN. Since November 2014 they owe me printed invoices. I don't want unintelligible MMS messages (unprintable) or links (phisable), I want the real printed ones. They can successfully send invoices to someone else at the same mailing address, so it can't be the mailing. It's probably the attitude!<br> <br> Calling 808 is an enormous waste of time! Calls get dropped and you could hold on forever listening to annoying marketing messages.<br> <br> There were changes in the billing amount and as I could not see what they where for, I also want the right to make submissions against any of the invoices when I eventually receive them!<br> <br> Don't call me or send me an SMS or e-mail with a lame excuse. Just get my invoices together and send them to me, even if you have to courier them to me -- you are in any case at fault!<br> <br> Or do you recommend that I take it to the Consumer Tribunal?<br> <br> I took a brand new phone in for warranty check. So after three weeks (instead of 7-10 days) you give me a new phone, but an older model. Is that standard practice?