Graph has margin issues and not accepting custom margins

[SachinChauhanPy]

Describe the Bug

xhtml2pdf graph has issue with margin it is not accepting any external margin or padding and it just overlaps over above text or anything on upperside.

Minimal Example to Reproduce

firewall_chart_data = {
"data": [firewall_enabled,firewall_disabled],
"labels": ['Enabled','Disabled'],
"title": {"_text": "Firewall Enabled/Disabled", "x": 290, "y": 190},
"type": "pie",
"x": 170, "y": 50,
"sideLabels": 1,
"direction": "anticlockwise",
"simpleLabels": 0,
"slices": {"strokeColor": "white", "strokeWidth": 1},
"legend": {
"alignment": "right",
"boxAnchor": "nw",
"fontSize": 8,
"strokeWidth": 0,
"dy": 6,
"dx": 6,
"dxTextSpace": 4,
"deltay": 6,
"columnMaximum": 99,
"variColumn": 1,
"deltax": 175,
"x": 350,
"y": 125
}
}

Expected Behavior

it should align to center properly and we should be able to give 100% width to canvas box of graph.

Actual Behavior

Currently it just overlaps upper side on the anything above it and does not align properly to the center plus it does not accept full width.

OS version: Windows 11
Python version: 3.9.1
XHTML2PDF version: 0.2.8