Lack of response from finance department.

I have been trying to get assistance from the finance department with no luck. I made payment and sent proof of payment which was acknowledged. However, I still remain disconnected. I called in this morning at around 9:45 and was transferred through to the finance and they promised that il be connected within 5 minutes. It is now 17:49 with no connection. I tried calling the whole day with no response at all. The line remains unanswered. You will move from selecting different options with no response. I emailed the finance department twice today but there is no response.