Iran payed russia for s300.as far as I can see he has said:
our policy is implementing the (previous) signed contract with the same conditions.
there is not any word about new conditions or new versions.
سردار دهقان: اس۳۰۰ را امسال در اختیار میگیریم - مشرق نیوز | mashreghnews.ir
Russians will never supply Iran with S300 system so your question is not valid .