By mistake I have entered my PAC number to three sim so for cancel that PAC number and cancel port what I have to do please help me I don’t want to change my o2 sim. I want to continue with o2. So please help me.
That's a pretty big mistake @Mihir. If Three have started the port process your O2 contract may already be canceled. Probably too late to ring Three tonight. You'll have to get on to them first thing in the morning.