Non-PRO English to Turkish Other Idioms / Maxims / Sayings idiom

In the first sentence of Harry Potter: "Mr. and Mrs. Dursley... were proud to say that they were perfectly normal, THANK YOU VERY MUCH". "Thank you very much," in that context, means something like: "thank you very much (for asking); glad you asked." or "Thanks (for asking), but no thanks!" like:
"I can manage just fine, thank you very much!"
It's a pre-emptive reply, as it were, to anticipating someone asking whether you need help or some such. It's often meant a bit sarcastically, as when I say "I can manage just fine, thank you very much!", meaning something like: "No need to ask me, offer me help, as I can do this perfectly well by myself."
It has a sarcastic edge. It preempts the idea that someone would think differently. It's also often meant to end the line of conversation. An example would be:
"Those bags look heavy. Would you like some help?"
"I am perfectly capable of carrying my own bags, thank you very much."

The implication is that the person saying "thank you very much" is annoyed and/or affronted by the idea that someone would think that he/she looked like he/she needed help.

In the case of the Harry Potter quotation, it means that they're preempting the idea that someone might question whether or not they were normal. It fits in with the fact that they hate anything to do with fantasy, magic, imagination, creativity, etc.
Would τα παράπονα σου στον δημάρχο be correct in these contexts?