Canceling an subscription of Tidal

So, I choose to pay for my already existing Premium subscription of Tidal via App Store ONE month, and before it could charge me again, I canceled it, wanting to return to a Family one, but choosing to pay with a card rather than Apple Credit. When I went to Tidal.com to change my subscription, it said (and it still does): '' You have an active subscription. Please log in to your iTunes account to administer your subscription'', which is impossible. I've tried every single method, I've searched the apple site on this issue and other sites, but nothing clarifies this problem. I've also contacted Tidal Support and searched some more, but nothing helps. I could easily make another account on Tidal, but I dont want to lose all the songs I've saved and all the playlists I've made, and neither does my other family members.