Capitec (and Mastercard) Useless in Mozambique

I was told that Capitec was the bank to use when travelling overseas as they are apparently the cheapest. So I loaded up my Capitec Mastercard with cash, let them know that I would be travelling to Mozambique and headed out with my family. Not only does Mastercard not work in Mozambique at almost all merchants and ATMs, but Capitec has placed a hold on two transactions that failed when I first got there and now they want me to try and chase down the merchants to get them to write letters that the pending transactions won't be settled before they will release the funds back to me. It wasn't the mechant's fault or mine, it was Mastercard and Capitec's fault and they rejected the transactions so why are they holding the funds?! It has been 10 days waiting for the funds to no longer reflect as pending so that I can transfer the money out! Capitec support is useless and I'll be closing my account as soon as I can get my money back!!!