Hello
I have read the description very well
I used to work for a tech company where We were having similar work we have to call clients tell them about our new product. and sell them on a weekly payment based method. we have to also call for collection. I used to work in BPO sector so i can be really some help for you.
We can also negotiate on the bid.
You can also take my personal interview I will provide my personal details on message
Thank you