Experts leave customer without security

I lodged a call for a faulty energizer that was installed less than a year ago. There was confusion, query and dispute over quoted costs (and reason why not covered under the warranty). Security experts removed the energizer with no feedback. I would like a refund for the unit that is no longer In My possession. Furthermore a coc was never provided or issued (this is now a legal requirement for insurance purposes) numerous follow ups and queries with no response or feedback.<br> <br>