Does your house vibrate when the bells ring?
- if true, you might sue for potential property damage. That should make them think twice. In this case, soundproofing has little effect.
- if not, you might want to invest in better windows and/or window blinds. Neither should be extremly expensive and you can start by soundproofing the room you sleep in.
Fyi, we lived near a noisy main street. After changing the windows we were surprised how little of the traffic we heard.
That must be the toughest condition I read about in a long while. It's amazing that you kept going. It's also amazing that you decided to share this!