Really Disapointed MTN !

I have been requesting an invoice for february 2020 for 7 days now to no avail. Call centre Staff are competent, however cannot assist, or give any idea as to when it could be available. Every time i call same storey - cannot escalate call, cannot communicate with billing, just unable to help. Getting to the point where you are forcing me to re-consider where I re-new my contract.