Verified answer

You were almost correct, and made only one mistake: writing our services delivery instead of our delivery services. Delivery is being used as an attributive adjective, which means that it is being used to modify the following noun by telling what kind of services you are talking about. Thus, you should revise the sentence to read, "How satisfied are you with our delivery services in terms of defect-free solutions?"

"How satisfied are you with our service's delivery in terms of defect-free solutions?"