Lancet Laboratory billing treating people disgustingly!!!

I am so disquisted with @Lancet. My son gets an sms from atterneys for an outstanding amount. I phone them to enquire and this is for test which was done last year June.. NOw a year later my son gets the sms. Why dont they Lancet contact me.. I filled in the forms I am accountable for the billing!!! They have it all phone number email and everything. YET no contact a year and 2 months later an sms to my son. HOW is this. It is not right for business to treat cliets like this. I am so dissappointed that businesses treat people like this ;-(