FreshBooks Account Suspension Integration

I need someone to help me setup a system to manage accounts. I do have a gps tracking system where we charge clients monthly a fee to use the system. Some clients have multiple login account, these need to be grouped together so when a client dont pay we dont close 1 and miss to close the others and he will keep tracking on other account. We receive cash payments, swipe and bank transfer. We use freshbooks to process payments and based on open invoices we close accounts on my server website. I need someone to help me with creating a system to manage things and maybe help me keep in track of new clients and existing clients. Maybe create something or a website or somehow a way to keep informations accurate

Project ID: 40218483