Poor service from Nqobile

I received a letter of demand regarding a late payment, and I take full responsibility for the oversight. I promptly called to acknowledge my error with the reference number. Additionally, I sent Nqobile proof of my payment, which was made on January 24th for the February rent. However, she has been unavailable all morning, and every time I try to reach her, she is on lunch break. To make matters worse, my power has been turned off, severely hampering my ability to work from home. I request urgent assistance to resolve this issue so I can get back to my work.