Bad treatment and harassment from Virgin active

Virgin active has really disappointed me in terms of how they treat their clients. I joined in September 2019 and the contract is suppose to be for 1 year. Covid 19 came and impacted on all of us. I didn't attend gym due to it. No money was deducted from my account due to gym closure. The contract is suppose to expire in August or September 2020. Unfortunately I lost my job due to Covid 19 and I went to virgin active in K90 to notify them. Now they are harassing me with calls everyday telling me I owe them money and they will blacklist me. How do I owe money if their business was affected by Covid 19? And I also notified them of my job loss? The contract reached the year I signed for. I asked them to send me an Email of what they are requesting but they never did. Is this how you treat your clients after all the world challenges we are facing?