Matrix is a Cheat company. They are prohibitively expensive and above all do not disclose all the details about the charges. Stealthily they charge additional surcharge and show bogus calls and sms on record. Their billing system is a complete fraud.
Beware one and all, do not deal with this company. It is always better to buy a local SIM card in the country where you are travelling. It is very easy and simple. And above all you are not paying obnoxious charges to this cheat company.