Home wifi issues

I had the worst experience with MTN over the last 4 months. I took out a new contract for a home wifi deal that consisted of 110 gig day and 110 night. Since then it my night day is not being depleted and falls away each night. Keep in mind that both me and my husband works shifts and we tend to use more at night than during the day. I logged multiple tickets for this issues and it's still not resolve. I request a detailed summary and the agent advise that she needs Auth for a Manger to send this and I'm still waiting on it. I logged a fonarl complaint on the 4th November 2021after getting no where with the advisors oh an then cant log complaints over the phone or transfer me to a complaint handler. Since the complaints has been log I received a automated reply with a complaint reference and no contact since then.