EY Graduate Financial Services Cyber Security Programmer interview questions

Applied online for the graduate program. Passed all of the online stages with all tests which included several assessments, video interview, etc. Received an email saying i passed all stages and was invited for an assessment center at EY which i confirmed my attendance for. Few days later a member of HR calls me to say my invitation is an "error" and that I should not come on the assessment day. Very unprofessional and disrespectful company. Invested several hours into the application process and passed all stages then told not to come to assessment centre after confirming attendance. Do not think I will ever apply here again.