Q: hello ...my problem with my iPhone is complicated ?!

hello ...my problem with my iPhone is complicated !!!

it is iPhone 5s ,has ios 8 and I've forgotten  my icloud account password which is associated with my old email that has been hacked from a while  ,and I want to delete my old icloud without a password ,,,however I have found a several ways but it didn't work at ios8 due the constant demand of the password at each simple step even the "find my iPhone status "

what can I do ?!