Nothing in sections 20-50, 20-576, 20-577, subdivision (3) of section 21a-92, subsection (e) of section 21a-115, sections 21a-240, 21a-243 to 21a-279, inclusive, and 21a-283, shall be construed as requiring the Commissioner of Consumer Protection to institute criminal or administrative action pursuant to said sections for violations thereof. In lieu of instituting criminal or administrative action pursuant to said sections, said commissioner may protect the public interest by serving suitable written notice or warning to the offending party or parties.