A couple of questions before I answer. Have you ever had any V&A training before? A lot of companies train their HR teams to listen for specific grammar and pronunciation warnings. You said your spoken issue is fine. Well then go for it. Don’t use the accent. Most companies will train you n V&A. You could also do mock interviews with friends using the accent so you can get more comfortable.
But be careful with the accent. Only use it if you have been trained on it. Remember a little knowledge can be more dangerous then no knowledge. Good luck!