No response from developer app subscription did not renew

Was offered a special promotion if i renewed during hamvention weekend, but when i paid, the subscription never renewed. I tried to contact the app developer several times but no answer. I tried to get support through apple as well and apple could not even help. Buyer beware! My app currently says it expired may 2016, i have tried reseting it, reinstalling it, etc. nothing changed. Good luck if you try to renew a subscription.

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