French to English Marketing Business/Commerce (general) Customer service?

I'm translating text for a French app that is pretty kooky all the way through, so I'm having to get a little creative to translate some of their ideas. But I'm pretty stuck on this one, especially since it doesn't have much context - it's a short text sent to a customer.

"Objet : C’est le spleen de xxxx (company name)
Preview : Dites-nous tout, nous sommes tout ouïe !

CRISE DE SPLEEN"

That's all there is, though it's on a page full of other short texts in which the general context is that they are trying to lure the customer back with various discounts, asking for customer feedback, etc... And this excerpt is the first on the list in fairly random order.

So I've learned that spleen in French refers to melancholy, ennui, yearning, sadness, etc. So I'm guessing it's expressing something along the lines of "we're sad to see you go, tell us what's wrong, we miss you, etc." But I'm really stuck on what to put for "crise de spleen" since it seems to be a heading or subject line of sorts. Other examples include MOT DE PASSE OUBLIÉ, QUE S’EST-IL PASSÉ, JE VOUS DIS TOUT, JE VOUS EXPLIQUE, JE RAVIVE LA FLAMME. So it needs to be short and sweet, the cheekier the better.

Any creative types have any ideas?

UK English.

Thanks!