Telecalling Renewal Campaign for Services

I have an active list of past customers who use my professional business services and it is time for their renewals. Your task is purely follow-up: calling these existing clients, reminding them that their service period is ending, and securing a fresh order or contract extension... (Budget: ₹600 - ₹1500 INR, Jobs: Call Center, CRM, Customer Service, Data Entry, PHP, Sales, Software Architecture, Telemarketing)