Neighbor moved and mail

Our friends lived next door to us but moved an hour away. The new neighbors keep giving us their mail when it comes in.

After about 6 times of taking their mail and re mailing it to them, I asked for them to forward their mail. It costs me money to send them their mail and it’s an inconvenience (and they have never said thank you- it’s like an expectation). She said she would forward right away (this was weeks ago). Well today I received more mail for her...

Would you...