I bought the first Worldsim card 10 years ago at KLM. 2 years ago I bought two more for my employees for Africa. When I locked into my account recently, I had no access anymore to my 3 WorldSim cards which were loaded with app. 140 EUR. So I wrote to the customer service. The answer was: You can buy other cards... This is how they make business. I am still waiting for an answer of a decider at WorldSim in case of a cost-free solution or paying back my deposit, but I am sure - nothing will happen. Be warned with WorldSim.