Accidentally transferred $100 to this company inst...

Accidentally transferred $100 to this company instead of to my parents for a private loan as I had their bank details saved in contacts. Tried to contact them many times to get the money returned and never got anywhere. The line quality is so terrible it makes it really hard to hear what they are saying (where are you based?!.) and the customer service reps have lousy English which makes it hard to effectively communicate. Not surprising really for a debt collection company but disappointing since it doesn t need to be this way.