Helios And Matheson — Fixed deposit Principal and Interest not received

My Mum Synora Marie Gonsalves a senior citizen who sadly passed away of Cancer in 2018 was due 25, 000/- + 10, 770/- in April 2016 on her fixed deposit invested,

I, Danielle Maria Gonsalves was due 34, 000/- + 14, 647/- on my fixed deposit which was due in June, 2015.

Is, there anyone I can contact from Helios and Matheson to help me get back what is due to us?

Thank you.

Danielle Gonsalves