Does everyone agreed that customer service is not a department, but an attitude?

sure dear

Customer Service can be both. It's a department when it's represented by attitude + a devoted business section with own staff & leadership to enforce relatively big scale customer service policies.

On a smaller scale, one-man-business for instance, it cannot be a department obviously but more of an attitude.

Organization-wide, customer service can be an attitude, not concerned with practicing standard customer service activities per se, but pulling in the same direction of realizing overall customer satisfaction.

Yes, ATTITUDE. We saw a reserach paper90% of customer is loosing bad attitude to the customer by sales man.

Without a doubt.

THATS TRUE,,, ITS ATTITUDE