Thank you very much for your query.
From the facts which you have stated, it seems that the workmanship was of substandard and unsatisfactory quality. Legally speaking, any person engaged to provide services must provide reasonable skill and competence and must complete the job in a satisfactory manner. Given that he has mixed the hot and cold water pipers, installed pipes in locations where he was not supposed to install, caused property damage whilst doing his work etc all seem to indicate the substandard nature of workmanship. If you brought someone else to fix the damage, it is a good 'mitigation of loss' step by you, which shows your bona fide to minimise your loss and get things in working order (in a successful civil action, you will be able to recover such costs). With regards ***** ***** plumber, I note that he is also abusing you and/or sending abusive text messages and coming on the property with intention to generate unnecessary pressure through his conduct so that you are forced into paying him.
Note, that with regards ***** ***** services provided to you, your action lies under civil law, whereby, you can claim damages for negligence in providing services and/or breach of contract.
As with abusive text messages and threatening conduct, your remedy lies under criminal law. So, for the civil law breaches, I suggest you send him a legal notice apprising him of his breach of duties and negligence. For his potential criminal act/behaviour, you need to report it to police, who will guide you with respect to any criminal sanctions under which he may be charged.
Lastly, I would also say that I consider you have strong evidence (images gathered etc) against him giving you greater merit for success.