Informative Investagating Service

You might want to make sure that all your words are spelled correctly if you're going to be advertising so just so you know more than once I've seen investigating spelled investigating which is not correct and I've seen it spelled with an e and an a but rarely the correct way. And im confused is it "Informative Investigating Service" or is it "Informative Investigating Services? Not clear and not professional to have misspellings on your advertisements. J$.