Hello Mandeep,
You have chosen Cdiscount Mobile, which doesn't offer a number for you to contact the customer service. You can contact us through our website and our social media accounts for any question you may have. I'm sorry but not all of us may be able to answer your questions in english.
When the postal service couldn't deliver your order, it came back to us.
When the new delivery was planed, the cancellation of your order was wrongly selected. That's why you may have been reimbursed of your sim card.
I can reassure you though, the cancellation isn't really made and your phoneline will keep working.
Don't hesitate to write again to us if you have any other question.
Have a nice day.
Maude, Conseillère Assistance Mobile
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Le saviez-vous ? Votre Espace Client est disponible 24h/24 et 7j/7 sur https://www.nrjmobile.fr/fr/client