@Rodrigo Liberoff Vázquez Thanks for your patience! I had a discussion internally and confirmed that termination had failed due to a known bug (This happens with all the V2 tiers).
Your service has been terminated now could you please verify and let me know incase of further queries, I would be happy to assist you.
Please accept as Yes if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.