Contract date & data

Good day, I battle with Vodacom since May to solve my issue with me contract renewal date. I upgrade my internet number and Vodacom upgrade department upgrade my main number. I phoned them since May to change the renewal contract date back to my main number and allocate the new renewal date on my data. Now I can't upgrade my phone because the system told me that my main number are not due for upgrade. Please correct the problem.

I also found this morning that my wifi data usage are used up and I only start using last night. How is that possible? I didn't use it since the beginning of the month. Please explain.