I have been marketing a website and was recently reported to my ISP about spamming...even though it was completely unjustified as I do not consider what I am doing as spam

Will hide my ip stop me from being reported to my ISP again?

For a great definition of spam, Samhaus.org offers this definition:
http://www.spamhaus.org/definition.html

"The word "Spam" as applied to Email means Unsolicited Bulk Email ("UBE").
Unsolicited means that the Recipient has not granted verifiable permission for the message to be sent. Bulk means that the message is sent as part of a larger collection of messages, all having substantively identical content.

A message is Spam only if it is both Unsolicited and Bulk.
- Unsolicited Email is normal email
(examples: first contact enquiries, job enquiries, sales enquiries)
- Bulk Email is normal email
(examples: subscriber newsletters, customer communications, discussion lists)"

And best of all is this explanation from Spamhaus:
"Spam is an issue about consent, not content."

Regardless of what you may feel you're sending in terms of email, the above definition is generally regarded as the correct definition of spam.

Unless you are sending anonymous emails (and why would you do that if you feel you're not spamming?) then even if you do mask your IP in the emails, you can still be reported as a spammer.

No, using Hide My IP cannot stop anyone from reporting you to your ISP.

Anyone who spams using the Hide My IP software will have the unlock key code disabled and there will be no refund on the purchase.