Bad service

I had a very hectic time with Mondo people, they all they products with lies. I bought one sim card and they gived me two instead of one and told me that the other one is for incase if I loose one card, and they didn't tell me that I will be paying double from what I expected. Anyway way bad service!!!. They didn't want to resolve the problem, instead they forced me to pay for something I did not have use of it, something I didn't use at all. They harased me by sending me many Sms, saying that I will be blacklisted between a space of one month after I revised the payment.