Can you please check who’s charging me.

How to check who’s charging me? I don’t have any subscription or I’m not trying to buy anything online, but I’m getting a text message: Due to insufficient funds, your recent purchase could not be completed. Top up your account and try again.

Since I’m not putting any amount on my mobile number, I’m safe to auto deduct but I’m still curious who’s trying to charge mo of anything?

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