Name change company

[Roohi Bhatti]

Hi, I got my one experience letter in CEC but from last year Im getting cheque from the old name, and in letter its old name but they have changed the name , so the letter I have got is with old name, pay cheque is with old name,,, but T4 I have got is with new name. What should I do ?. Shall I carry on with old name letter, or new name, but pay cheque are with old name. Im confused