Husband refusing to issue talaaq

Q: I am a mother of 4 and have communicated with a Moulana that I would like my Talaq due to a toxic and unhealthy relationship. He refuses to give me talaq and I am now considering leaving. If I leave, how long does it take for an automatic talaq to be finalised and if not how may I, as a woman, go about giving him the talaq.

Marital problems

Q:

1. I am a 30 year old married woman. It is 7 years since I am married. There has been marriage issues between us. Now he decided to divorce me. We have a 5 year old daughter. But I dont like to get divorced as it is a major sin. If he does so, is there any sin on me?

2. Also, can you send a dua to me to avoid a divorce. I am very depressed.

Talaaq on WhatsApp

Q: I was recently married and have asked my husband for talaq because he is not providing for me and since I told him I'm pregnant he has not supported me or the baby, he is not with me cause he chose to walk out on us, he cannot provide a home or anything neither has he done anything as far as the pregnancy goes, I am doing this on my own but with support from my family. He did give me talaq but via watsapp, so I would like to know if the talaq is valid?

Buying back an item at a lower price

Q: I am in the business of buying and selling car mags. A few months back, I sold a set of rims to someone for R1800. A couple of months later, I got a call from the same person asking if I want to buy these same rims back because he had no use for them. I made him an offer of R1200 and purchased them back. Is this considered as riba or is it permissible?