01628 334216 Positive Who called me from this phone number?

So, made a mistake and entered my number on one of these private insurance compare website. Got a call from a lady (seemingly in a coffee shop environment) called Katie from Usay Compare even though I did not enter my data on that website. She wanted to know more details about me before being able to give me any kind of ballpark figures about any care plans, etc. The usual jargon of a sales person (and we all know that this kind of data is being sold further for £££)...she couldn't give me any kind of indications on what to expect a private insurance over could cost. Well, that's it then, you ain't getting my house number, etc. from me either! I can find all the information online myself. Thanks but no thanks! Also, the phone number shows that it is a local number but it isn't....

This number is used by a medical insurance comparison provider, sadly i clicked something and within 30 seconds they were calling, that was a month ago and despite my protestations, they are still calling. Basically they want to sell you a tailor made healthcare package and are some sort of broker. They are based in Cirencester but have one of those phone systems that can generate a call with a dialling code local to you, in the case of 01628334216, this is a Maidenhead number and whilst i'm not in Maidenhead, i'm not far away. They seem to trade as usaycompare.com

Initially thought this was a spam call, but it's not. It's private medical insurance.

Had several calls from this number ringing for just a few seconds before stopping and before I answer. Suspect that the area code is falsely showing as 01628 to appear as a local call in my area.