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Are you sure the card has a low limit?
According to the official Mistertango pricelist their Mastercard has the following limits
for private individuals:
1. Maximum monthly transactions limit: 15000
2. Maximum annual transactions limit: 20000
3. Maximum card payment limit per day: 3000
4. Maximum per ATM transaction: 1000
5. Daily ATM withdrawal limit: 1000
6. Minimum ATM withdrawal limit: 10
If you intend to make transactions for more than 20000 in a year,
the limits are too low for you. Otherwise, the limits
should be sufficient. I´m not sure whether you can raise the limits
by being a long-term customer or by providing additional documents.