Hi Silent,
Sorry to hear about the troubles. Let's start by walking through our awesome Help article here:
https://www.bungie.net/en/Help/Article/11930
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I also get the contacting destiny servers message many times a day and a few disconnects a week. Even though my ps4 party chat stays connected perfectly when the game has a problem. I have a wired connection and a 10 meg down and 1 meg up broadband here in the UK