Try 02. I've been with them since before they changed their name and have always had a friendly experience when calling them. They've always told me when I could be paying less to and changed my plan to lower my bill. I have never had a bad experience with them in more than a decade of custom.
I think the title needs adjusting. You can remove the word "Service" from it.
You were given a straight answer and instead of accepting it, decided to be obtuse and rude. I hope you feel proud of yourself.
How do you suppose a precise time can be worked out for you? Do they know in advance how...