Bad Support They have no clue what they are doing

i have purchased a windows hosting plan and there was issue with domain name being registered and it got pointed to the hosting plan as well as attempting to add 2 other domains to the hosting plan when communicated with support it was supposed to cancel the incorrect domain name and register the correct one and fix the hosting plan accordingly, they kept going on loop on how it takes 24/48 without taking any action to change and not even fix on the account was provided until it gets propagated accordingly and after 5 more communication with the support team they only changed the primary domain on the host to yet another incorrect one and only to get it right on the second after 2 days of going back and forth with them about it and refused to cancel the incorrect domain and told me it was non refundable while one of the support team said it will be cancelled as I requested the same day as the incorrect domain was registered yet there is another error to add the other 2 domains when attempting to add them there is error produced "DNS Name already exists" while its not showing in the Plesk to work on when attempting to contact them again the response was oh we don't support this service which was windows Plesk service and yet the issue persist to this day and not being solved every communication is "will add note to admins to help get it fixed" and yet no action is being taken