It's a game. There is no way of enforcing any player to help you, you have to ensure that you play in such a way that they want to help you.
That is, if you want something, you have to lay out your city and behave in such a way that players do what you want them to. Some will, some won't.. but the skill is in making them want to help you.
Be clear in your banner. Make sure you look active (get rid of old cultural event buildings and update with the latest, so that players know you are active). Advertise your advances. Change your profile picture.
Take trades and pm them or visit in thanks. Make them aware of you.
If you want culture help, make sure you visit all others who want culture help, trade with them, talk to them, take their trades.. it's interactive and you will get out of it, what you put in. And make sure you have enough cultural buildings, preferably either close together or close to the Main Hall.
If it's your FS is the problem, and after complaining, they still don't visit.. reflect? Why? Have you made it hard for them... are you online 24/7 in a FS that is full of weekend warriors... ? Whatever.. Maybe you need to change FellowShip..
In any case, yes, it's sad when you don't get the help you ask for, but it is up to you to finally find the right FS and behave in such a way that you are a player that other players want to help.