Etech Mobility review for DIY Tax Exempt Checkout

UPDATE: Decreased from 5 to 2 stars App no longer works properly and has been disabled. Despite selecting without tax, tax is occasionally applied at checkout. Support is no longer interested in replying to resolve issues. UPDATE: Increased from 4 to 5 stars Request no.2 in my previous review update was implemented very swiftly and is working well. Thank you team. UPDATE: Increased from 3 to 4 stars The problems below were resolved swiftly. I am waiting for the implementation of the following feature requests which are fundamental to my business. Once enabled, this APP will be getting 5 stars 1. Having no pre-selection on the options 2. Having the "without VAT" option as a preselected default. -- Seems to be working ok on Chrome PC but the form does not have a responsive design on mobile. I have also noticed that the form can be ignored on the Safari browser on mac OS (works ok on iOS). Meaning, that customers can go through to checkout without entering the required form details. Please can somebody get in touch with me to make the form appear responsively on the mobile cart page (Debut theme used) and the debugging of the form on the Safari browser?