Mediamarkt: Incorrect Contract Extension

Dear o2 Customer Support Team,

I am writing regarding an issue with a mobile contract extension that was processed incorrectly today at a MediaMarkt store.

I visited MediaMarkt today to extend my mobile phone contract for my correct phone number 017xxxxx. Unfortunately, the employee mistakenly applied the contract extension to a different phone number, 017xxxxx which is also under my name.

After the mistake was identified, the MediaMarkt employee immediately raised a support ticket (Ticket No. 27524105) and informed me that the incorrectly applied contract extension had been cancelled.

Please can you let me know  that the contract extension for the incorrect number 017xxxxx has been successfully cancelled and that no charges or contractual obligations will arise for me as a result of this error. if not please can you tell me what would be the next steps that I would need to follow this mistake.

Thank you very much for your support. I look forward to your confirmation.

Kind regards,
Sanjay Sardiwal

EDIT: Rufnummern editiert, und verschoben von o2 Mobilfunk zu Englisch mobile, o2_Maria,  17.01.26