hi im using verizon cdma iphone 4s on gsm network with gevey multi network sim,everything works except voice mail i can recive notification but when i press voice mail button i have busy tone thats because under settings and phone somehow i got installed vodaphone vf nl services??? i dont know how thats is possible and my phone every time i want to hear voice mail dialing phone number in netherlands and looks like this,so i need to dial aditional simple mobile carrier number in order to hear voice mail any help please?

vf nl services-->> klantenservice +31654500100
voicemail aan +31654501231
voicemail uit +31654501230