If I understand you correctly you have a tariff plan with a national bundle and you added a separate data roaming bundle of 2GB (not included in your normal subscription). Is that correct?
From 15 June 2017 onwards, the optional EU bundles for mobile Internet data usage will be stopped, as any data use will be deducted from your standard package. Any remaining credit will be deducted from your next bill.
Meaning that you can terminate the seperate data roaming bundle
More information concerning what will happen to your subscription as of the 15th of June is to be found here.