No, you shouldn't complain, but you could do one of either two things:
1. Offer constructive criticism. In some cases that won't work ("Hey, try not to lose my emails next time, OK?") but in others it works a treat ("Hey, can you offer me a way to download my email?").
2. Vote with your feet as most likely there are competitors that offer the same service also for free. Good luck moving your data, but you already knew you were committing your data to a service that is not guaranteed to exist tomorrow, right?
1. Offer constructive criticism. In some cases that won't work ("Hey, try not to lose my emails next time, OK?") but in others it works a treat ("Hey, can you offer me a way to download my email?").
2. Vote with your feet as most likely there are competitors that offer the same service also for free. Good luck moving your data, but you already knew you were committing your data to a service that is not guaranteed to exist tomorrow, right?