I Cannot Access My Instagram Account Because the Security Code Always Fails

Dear Instagram Support, since I updated my account by changing the password, the system is requesting a security code. However, even though I enter the codes correctly, I keep getting an error. I also cannot upload the selfie video—it gives an error as well. I haven’t been able to use my account for two weeks. This process shouldn’t be this difficult. It’s really troubling that the security steps are this complicated. My phone number and email address are clearly registered, so I don’t understand why I’m facing so many issues. Please take into account how much time and effort I’ve spent trying to resolve this. I kindly ask for your assistance.