GSTN1

My mother is proprietor of our business - Saurabh Electronics- which actually is run by my father.
It's authorized service center for BPL Medical Equipments. My father & My mother started getting communication from Vodafone MTNL,Tata Power, Metro Mall, HDFC & ICICI securities etc to provide GSTN.They will be charging 18% or whatever actual GST on their services. My question is will Saurabh Electronics get GST credit input from the GST paid on Insurance, Power, Telephone, Shares purchase etc.Do these bills should be in my mother's name (being proprietor) or it should be in the name of Saurabh Electronics name or even in my father's name also will help

Would you please give me some clarification ?