to be 100% safe make call to your back and change your credit card number, or keep your eyes on your statement credit card if you getting any charges from public mobile and you Left public mobile, then you need to Contact Customer Support Agent by CS_Agent, and Explain your issue to
them can solve your issue, they are nice Service Team they will help you 100%.
Here’s How To Contact Customer Support Agent,
@Silentkhill93 I agree with @0PX9O4 that you don't need to call your bank or change your CC. However, it's a good idea to keep checking your CC for the next month just in case there was a glitch in the system (unlikely) and you see any charges from PM going forward which can then be handled by contacting CSA's here.