I may be wrong here, but was there ever a prompt when using Hotmail asking you to convert it to Bell/Sympatico hotmail?
Your hotmail would still appear the same but it would be tied into your Bell account.
Or else Bell hijacked your account at some point, because of a 'glitch'. You stated that 2-3 years ago it suddenly had a Bell logos.
Try Whatever 'abuse' contacts that Hotmail has and state that your ISP stole/hijacked your independent Hotmail account.
Login page for Hotmail with Bell logos.
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www.bell.ca/bellmailRegular Hotmail login page
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login.live.com