Online purchases from Temu

I purchased some items from Temu in January.Paid as directed and the goods were sent to me after i paid the courier charges. Then in late in January while browsing through their online catalogue and i liked a pair of sneakers and may have put this in my cart. A few days later an amount of money was debited to my bank account.So funds were taken from my bank account without my approval. The shipping company sent me a mail requiring that i pay courier charges before i receive the goods.I paid these shipping costs and received the sneakers. I reminded myself that I need to be very careful not to do what i did when visiting their online store and choosing goods. This kind of shopping comes with consequences as i found out.Then in February another amount was deducted from my bank account and i clearly remember what had already happened to me and refused to purchase from Temu. I then called my bank and declared a dispute and the payment remains as ''pending'' and I am still waiting for my bank to call me with regard to this dispute. This is a very case of funds being taken from bank accounts without any approval. How can a company like Temu just debit peoples bank account without their approval. The second problem is how do we contact Temu to reverse a transaction that has already taken place. I just cannot get hold of any responsible person at Temu to contest this. The only other recourse i have is to change my bank account which also involve inconveniences.So please beware of buying from Temu . Be cautious when dealing with any online organisations.