i need a machine learning expert to Improve the sales forecast calculation in a group of supermarkets

We use SAP and the formula for calculating sales forecasts (linear regression) is only based on the product average of the last 56 days of sales, which gives a very large percentage of error. We want to use machine learning from azure or another to calculate forecast sales to improve the error rate. The results obtained will have to be integrated into SAP to create the orders.

Sorry my english
Thanks
Paulo P