it's all good...
hmmm, not to be a monday morning quarterback... but it was mentioned for you to use a pre-paid calling card which comes in increments of $5 (+20minutes), $10 (+50minutes), available at ethnic grocers/convenience stores (to call a certain SouthAsian sub-continent country).
If you have any assertiveness and/or charm, you can get that amount credited from your long-distance provider stating that said they charge 'this amount ', so...blah-bhah-blah.