PayPal is note secure

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Hello,
I would like to offer this information to counter some of eBay and Paypal's claims that they systems are totally secure.* I know for a fact Paypal is not secure, the other day I called paypal as requested entered my phone number.* I was then asked for a 6 digit Temporary web PIN which I did NOT know.* So to get through to an operator I just dialled 000000.* To my alarm the answer phone then preceded to me my account balance, which was correct.
When I did get through to an operator I immediately explained to her, she said she would forward the information on to the relevant people.* Today a week later I did the same again and to my despair, the system again told me my account balance whilst only requiring my phone number.* I have called and emailed paypal and they just respond as if I must be mad.
I am no expert on internet security but I fear what else you can do with just a correct telephone number using paypal's contact centre.
Can somebody please tell me who to report this to as paypal are not acting on my reports.* I also recommend checking for yourself and if you have the same problem please report to paypal.