Is there any suspicion or prohibition in convincing customers to submit a transfer request to the mobile company to benefit from offers from other companies, then canceling the request, in order to achieve the monthly target?

The purpose of your employment is to execute the conversion to benefit from acquiring new clients. If your work is limited to convincing clients to submit an application without executing it, then this defeats the agreed-upon purpose, and is a form of deception, a betrayal of trust, and an aid to falsehood. Therefore, you must cease this and work towards the true purpose intended by your job.