Whats about doing it with “if statements” and raw_input ?
x = raw_input("Is there a problem with your hardware or is do you need technical assistance. Please type technical assistance or hardware")
if x == ("technical assistant"):
print("This troubleshooter is only for hardware problems please call 01474 709853 for technical assistance")
if x == ("hardware"):
x1=raw_input("Have you dropped your phone recently? Please type Yes or No")
if x1 == ("No"):
x2=raw_input("Is your phone able to charge? Please type Yes or No")
and so on…