Promotion of subscribers in a Telegram channel

We have a physical clothing store in Odessa. Stock clothing is leftover new branded clothing from previous collections, in single sizes. Therefore, the clothing is sold really cheaper by up to 70% from the prices of the official dealer.

In the Telegram channel, we publish items with a description of the product and its price.

We need help in promoting the Telegram channel, gaining real subscribers, and launching sales through Telegram.
PLEASE PROVIDE GUIDANCE ON THE NECESSARY BUDGET FOR AN EFFECTIVE SOLUTION TO THE ASSIGNED TASK.

We have also created channels on Instagram and TikTok platforms. Later, we will need help in promoting these platforms as well.