Canceling the contract via Phone (English_

To put things in simple terms, I marked the contract for cancellation via MyO2 Portal. Now I need to call and finish the process. Unfortunately, number I should call has no switch to English and totally helpless in this situation

 040 - 51 900 66 42

Sometimes I wonder whether O2 deliberately use no english support to make the cancellation process close to impossible for expats, so they can keep deducting money from the account. 

When I first landed in DE, was looking for a mobile contract and was quite impressed by the customer service at one of the O2 shop and decided then & there to go along with a 2 year contract. However, once you sign the contract things changed drastically. You have literally waster hours pinging them in Twitter and Facebook to get some attention. 

Can the support team here help me out and change my disappointed status to somewhat positive status?

Thank you!!!