Office Administration - Invoice tracking

We are a small firm which sends out around 10-12 invoices per month. We are looking for someone who can chase these invoices if not paid, track them once they are paid. This might be one hour per week, or two hours on a biweekly basis. The work would be entirely remote. The person would receive a company e-mail and standard texts to communicate with clients. At the end of the month a small excel should be provided with open positions, etc. Needs someone who communicates well via e-mail or phone and keeps track of deadlines. Looking for a longer term engagement which potentially grows to other projects within office management.

Paid per hour.