Hello,
I am writing here since I was unable to communicate with customer service people in my broken German and there was no attempt made whatsoever to accommodate my broken German either.
I have just cancelled my mobile sim contract but i am also required to call the customer care and let them know about this, which I am unable to do. Could you please let me know how do I do this? Is it possible to write an email or is it possible to do it here or should i send a letter? There was no information about sending a letter but just to contact the customer service my telephone. I am attaching the screenshot anyways.

I look forward to hearing from you.
Regards,
Mudassir