I recently switched my Internet provider choosing Tim.it as I plan to switch to a Fiber To The Cabinet networking. I also moved my mobile subscription under the same bill with a comfy 500 minutes 2gb every 4 weeks. Then after a few days they billed me almost 20€ for a few megabytes of mobile data, less than 20,if I recall correctly.
I notified one of their “Twitter customer care” men and in less than 2 days they gave me back the undue credit, adding this sweet gift :
Gentile cliente, per scusarci ancora dell’errato addebito nei giorni scorsi, riceverai in regalo 3 GIGA di internet per 3 mesi. Nelle prossime ore un SMS ti confermerà l’attivazione. Info al 409161 o nella sezione MyTIM di TIM.it
Well done!