"Hi, I got extension and did not submit it. My question is: can I take one more extension or do I need retake year?"
My understanding is that you can only get one "extension" (i.e. permitted late submission due to ECs/PMCs) for an individual assessment. What happens next depends on what uni you are at, as the rules & regs vary across the sector, and it also depends on whether you have ECs/PMCs, the credit value of the module in question, whether it is core or not, etc. Has your Assessment Board met, made a decision and sent you a results letter?