First off, it's not a good idea to post personal details such as your phone number on a public forum like this where anybody can see and use it.
Secondly, you can check your membership plan auto-renewal status yourself on your My48 account here:
There's no "validation" involved and you don't need 48 support to do anything with this.
Lastly, if auto-renewal failed for some reason then just buy your membership plan manually for this month and auto-renewal will take over again next month assuming that the registered payment card details on your account are valid.
If you need to contact 48 support about this then see the links in my signature below.
