Washington Mutual Teller stealing information to stalk a customer

Both my girlfriend and I have been long time customers of Washington Mutual. Last week at the Riverside Dr adress in Sherman Oaks, one of your bank tellers repeatedly harrassed my girlfriend for her phone number. She declined several times. Today she went in to the same branch to cash her work check and was harassed again by the same employee. She declined to give him her phone number again. Hours later while at work, this same teller came into her work and said he found out where she works from her check and again harassed her for her phone number. She declined a third time. This same teller refused to leave and the manager of her store had to call security. She does not know his name but described him as an Arabian or Indian descent male. This infuriates me that Washington Mutuals Security and personal customer information is being stolen by employees to stalk and harass its customers. I will be filing a Police Report as well and demand that this employee be terminated.