Zara - can't honor Return policy

Bought clothes from Zara Tyger Valley 16 August 2019 wanted to return it 15 September 2019. Were very rudely treated with "it is not within 30 days as the policy states, you can't". Manager were very rude and unhelpful! I even used Google to calculate the days and it is still "within 30 days". As a customer I feel it is my right to still return it, even if it is on day 30!!! Logged a complaint - just to get an automated e-mail from Customer service with all the terms and conditions and "we cannot help you on this occasion". Very disgusted, Zara does not know what customer service means!