Lip injection won't dissolve in 5 years, advice?

Hi, i had lip injections overseas 5 years ago and until now it hasn't moved or dissolved at all, i am very worried since they are sitting 5 years in my lips and am not sure if this may cause complications or problems for me in the future such as cancers ... At the time i was told they are non permanent and would disappear within 18 months Should i be worried about this? what is the best way to resolve this issue?